Beyond a doubt truth bears the same relation to falsehood as light to darkness.
Fire may be represented as the destroyer of all sophistry, and as the image and demonstration of truth; because it is light and drives out darkness which conceals all essences.
The eye which turns from a white object in the light of the sun and goes into a less fully lighted place will see everything as dark.
Every body in light and shade fills the surrounding air with infinite images of itself; and these, by infinite pyramids diffused in the air, represent this body throughout space and on every side.
Shadow is the diminution alike of light and of darkness, and stands between darkness and light.
Darkness is absence of light. Shadow is diminution of light.
The outlines and form of any part of a body in light and shade are indistinct in the shadows and in the high lights; but in the portions between the light and the shadows they are highly conspicuous.
A single and distinct luminous body causes stronger relief in the object than a diffused light; as may be seen by comparing one side of a landscape illuminated by the sun, and one overshadowed by clouds, and so illuminated only by the diffused light of the atmosphere.
No small hole can so modify the convergence of rays of light as to prevent, at a long distance, the transmission of the true form of the luminous body causing them.
A shadow will appear dark in proportion to the brilliancy of the light surrounding it and conversely it will be less conspicuous where it is seen against a darker background.
A dark object seen against a bright background will appear smaller than it is. A light object will look larger when it is seen against a background darker than itself.
When the sun appears which dispels darkness in general, you put out the light which dispelled it for you in particular for your need and convenience.
Men born in hot countries love the night because it refreshes them and have a horror of light because it burns them; and therefore they are of the colour of night, that is black. And in cold countries it is just the contrary.