Plato's Understanding of Reality

Plato’s Understanding of Reality

Plato’s worldview is influenced by his desire to provide solutions to some of the key pre-Socratic debates that were then current.

Problems Plato was addressing

Plato tries to answer questions about the possibility of certain knowledge in a world where everything is changing.
Another problem Plato tried to address is sometimes known as the problem of the one and the many - are there many things, or is there only one thing really?
These might seem odd questions, but they form a basis for a theory of knowledge still influential today.

Knowledge of changing things

Heraclitus (pictured), a pre-Socratic philosopher, had said that everything flows; there is no unchanging essence to anything.
This was a problem for two reasons (covered in the next slides).

Can I know a thing that changes?

If I say I know something and then that thing completely changes, how can I be said to know it?
- For instance, when a good friend changes, we sometimes say: “I don’t know him any more”.

Essence & change cannot co-exist

If absolutely everything changes, then there is no such thing as an essence. The very idea of essence relies on the fact that there is an unchanging core of something that stays the same regardless of changes in appearance.
- For instance, I might paint an egg blue, or crack it into a pan, or scramble it, but I would recognise that beneath that change in appearance, it remains an egg. So if nothing has an essence, then nothing is really knowable at all.

Breaking down the theory

We can examine this idea by looking at the difference between knowing that:
- The interior angles of a triangle add up to 180 degrees;
- Eggs have yellow yolks.
The first proposition is much more certain than the second. Given the very nature of angles and triangles, it is impossible that it could not be true.
But even though my past experience has shown almost completely consistently yellow egg yolks, I can’t be certain I won’t find one of a different colour in the future.

Only a priori knowledge is true

So, mathematical or logical knowledge gives much more certainty than empirical knowledge (knowledge gained from experience).
Plato argues that, in a real sense, the only kind of knowledge that can be called true knowledge is logical or a priori knowledge (knowledge that comes from theory or reasoning).

Plato's thoughts on opinions

Having an opinion of something is not the same thing as knowledge. When we have an opinion, we think we know something, but we don’t.
Plato is arguing for epistemological humility (awareness that our knowledge is always incomplete) but doesn’t say that we can never have true knowledge of anything.
It is still possible to have true knowledge because if there wasn’t, it wouldn’t even be possible to have an opinion. This is because an opinion is a mixture of truth and falsity - you are right in some ways and wrong in others.

1Philosophy of Religion

1.1Ancient Philosophical Influences: Plato

1.1.1Plato's Understanding of Reality

1.1.2Plato's Theory of Forms

1.1.3Plato's Analogy of the Cave

1.1.4The Purpose of Plato's Analogy of the Cave

1.1.5Evaluation of Plato's Theories

1.2Ancient Philosophical Influences: Aristotle

1.2.1Aristotle's Understanding of Reality

1.2.2Aristotle's Four Causes

1.2.3Aristotle's Prime Mover

1.3Ancient Philosophical Influences: Soul, Mind, Body

1.3.1Plato & Aristotle's Views of the Soul

1.3.2Metaphysics of Consciousness

1.3.3Materialism - Ryle’s Philosophical Behaviourism

1.3.4Materialism - Identity Theory

1.4The Existence of God - Arguments from Observation

1.4.1The Teleological Argument - Aquinas' Fifth Way

1.4.2The Teleological Argument - Paley & Evolution

1.4.3The Cosmological Argument

1.4.4Hume's Criticisms: Teleological & Cosmological

1.5The Existence of God - Arguments from Reason

1.5.1The Ontological Argument

1.5.2Criticisms of the Ontological Argument

1.6Religious Experience

1.6.1Introduction to Religious Experience

1.6.2Mystical Experience

1.6.3Conversion Experience

1.6.4Understanding Religious Experience

1.6.5Issues Relating to Religious Experience - Validity

1.6.6Issues Relating to Religious Experiences - People

1.7The Problem of Evil

1.7.1Presentations of the Problems of Evil

1.7.2Discussion Points -

1.8The Nature & Attributes of God

1.8.1Omnipotence

1.8.2Omniscience

1.8.3Boethius - Divine Knowledge, Free Will & Eternity

1.8.4(Omni)benevolence

1.8.5Eternity & Free Will

1.9Religious Language: Negative, Analogical, Symbolic

1.9.1Apophatic & Cataphatic Way

1.9.2Symbol

1.9.3Discussion Points: Religious Language

1.10Religious Language: 20th Century Perspective

1.10.1Logical Positivism & Verification Principle

1.10.2Wittgenstein

1.10.3Falsification Symposium: Flew & Hare

1.10.4Falsification Symposium: Mitchell

1.10.5Discussion Points: Verification & Falsification

1.10.6Discussion Points: Aquinas vs Wittgenstein

2Religion & Ethics

2.1Natural Law

2.1.1St Thomas Aquinas - Telos & Four Tiers of Law

2.1.2St Thomas Aquinas - Precepts

2.1.3St Thomas Aquinas - Real & Apparent Goods

2.1.4Discussion Points - Natural Law & Doing Good

2.1.5Discussion Points - Telos & Double Effect Doctrine

2.2Situation Ethics

2.2.1Fletcher's Situation Ethics

2.2.2Fletcher's Concept of Conscience

2.2.3Discussion Points: Moral Decision-Making

2.2.4Discussion Points - Agape

2.3Kantian Ethics

2.3.1Introduction to Kantian Ethics & Duty

2.3.2Hypothetical & Categorical Imperative

2.3.3Summum Bonum & Three Postulates

2.3.4Discussion Points: Kantian Ethics

2.4Utilitarianism

2.4.1The Utility Principle

2.4.2Act & Rule Utilitarianism

2.4.3Discussion Points: Utilitarianism

2.5Euthanasia

2.5.1Key Concepts for Euthanasia Debates

2.5.2Discussion Points: Natural Law & Situation Ethics

2.5.3Discussion Points: Sanctity of Life

2.5.4Discussion Points: Autonomy & Medical Intervention

2.6Business Ethics

2.6.1Corporate Social Responsibility & Whistle-Blowing

2.6.2Good Ethics & Globalisation

2.6.3Discussion Points: Utilitarianism & Kantian Ethics

2.6.4Discussion Points: CSR, Globalisation & Capitalism

3Developments in Christian Thought

3.1Saint Augustine's Teachings

3.1.1Human Nature

3.1.2Original Sin & God's Grace

3.2Death & the Afterlife

3.2.1Heaven, Hell, & Purgatory

3.2.2Different Interpretations of the Afterlife

3.2.3Election

3.2.4The Final Judgement

3.2.5Discussion Points: Heaven, Hell & Purgatory

3.3Knowledge of God's Existence

3.3.1Natural Knowledge

3.3.2Revealed Knowledge in Faith, Grace, & Jesus Christ

3.3.3Revealed Knowledge in the Bible & Church

3.3.4Discussion Points: Reason & Belief in God

3.3.5Discussion Points: The Fall & Trust in God

3.4The Person of Jesus Christ

3.4.1Jesus Christ’s Authority as the Son of God

3.4.2Jesus Christ’s Authority as a Teacher of Wisdom

3.4.3Jesus Christ’s Authority as a Liberator

3.5Christian Moral Principles

3.5.1The Bible & Love

3.5.2Bible, Church & Reason

3.5.3Discussion Points: Christian Ethics

3.5.4Discussion Points: Love & the Bible

3.6Christian Moral Action

3.6.1Dietrich Bonhoeffer & the Confessing Church

3.6.2Bonhoeffer & Civil Disobedience

3.6.3Bonhoeffer's Teaching on Ethics as Action

3.6.4Discussion Points: Civil Disobedience & Bonhoeffer

3.7Development - Pluralism & Theology

3.7.1Pluralism & Theology: Exclusivism & Inclusivism

3.7.2Pluralism & Theology: Pluralism

3.7.3Discussion Points: Salvation

3.7.4Discussion Points: Pluralism Undermining Beliefs

3.8Development - Pluralism & Society

3.8.1Development of Multi-Faith Societies

3.8.2Responses to Inter-Faith Dialogue

3.8.3The Scriptural Reasoning Movement

3.8.4Discussion Points: Social Cohesion & Scripture

3.8.5Discussion Points: Conversion

3.9Gender & Society

3.9.1Waves of Feminism

3.9.2Traditional Christian Views on Gender Roles

3.9.3Christian Views on Gender Roles & Family

3.9.4Discussion Points: Secular Views of Gender

3.9.5Discussion Points: Motherhood & Family

3.10Gender & Theology

3.10.1Rosemary Radford Ruether

3.10.2Mary Daly

3.10.3Discussion Points: Ruether & Daly

3.10.4Discussion Points: Male Saviour & Female God

3.11Challenges

3.11.1Secularism - Sigmund Freud

3.11.2Secularism - Richard Dawkins

3.11.3Christianity & Public Life

3.11.4Discussion Points: Spiritual Values

3.11.5Discussion Points: Social Values & Opportunities

3.11.6Karl Marx

3.11.7Liberation Theology

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