33: No man, when he hath lighted a candle, putteth it in a secret place, neither under a bushel, but on a candlestick, that they which come in may see the light. 34: The light of the body is the eye: therefore when thine eye is single, thy whole body also is full of light; but when thine eye is evil, thy body also is full of darkness. 35: Take heed therefore that the light which is in thee be not darkness. 36: If thy whole body therefore be full of light, having no part dark, the whole shall be full of light, as when the bright shining of a candle doth give thee light.

33: No man, when he hath lighted a candle, putteth it in a secret place, neither under a bushel, but on a candlestick, that they which come in may see the light.

Candle (lamp) – Psalm 119:105 Thy Word is a lamp . . . and a light . .
Light a Candle – Psalm 18:28 enlighten my darkness
Darkness – Psalm 82:5 they know not . . . they walk in darkness
Candlestick – Revelation 1:20 the seven candlesticks . . . are the seven churches
Light – Psalm 43:3 thy light and thy truth
No one who begins to understand the Bible (lights a candle), hides what he has learned. Instead he takes it to the Church so that those who come into the Church may see the truth.

34: The light of the body is the eye: therefore when thine eye is single, thy whole body also is full of light; but when thine eye is evil, thy body also is full of darkness.

Light = truth
Body = the church members as a whole (see 1 Corinthians 12:27)
Darkness = lack of knowledge
Eye = prophet or teacher (See Isaiah 9:9 and Isaiah 29:10)
Single = obedience to God (singleness – See Colossians 3:22; Matthew 6:24)
The truth (light) of the Church (body) depends upon its prophet (eye). If its prophet is obedient to God, the whole Church (body) will be full of truth and understanding (light). But when the prophet (eye) is evil, the Church (body) will be full of error and lack of understanding (darkness).

35: Take heed therefore that the light which is in thee be not darkness.

Be careful therefore that the truth or understanding (light) which is in your Church or that you understand (in thee), is not really error and lack of understanding (darkness).

36: If thy whole body therefore be full of light, having no part dark, the whole shall be full of light, as when the bright shining of a candle doth give thee light

If the whole church (body) is full of truth and understanding (light) having no part of error (darkness), the church will be full of truth (light), as when the Bible teaches (shining of a candle) teaches you truth (light).