How the sun warms the earth, and in what manner.

It is asked whether the saints stand naked.

Man has a desire to know whether the woman will yield to the lust he seeks; and understanding that she will, and that she likewise desires the man, he entreats her and puts his desire into effect. And he cannot know it unless she confesses, and in confessing they couple.

The point has no middle, and its bounds are nothingness: it follows that the point is indivisible, nor is it part of anything; therefore all the points joined together are not divisible.

The point has no middle, and its bounds are nothingness: and all the points joined together are equal to one, and one to all.

The adversary says that the point either is or is not; and if it is, either it can move or it cannot move; and if it is moved, it describes the line.

I say that if the water remained without the earth around the centre of the world, it would take a perfect sphericity, which would be of such power that, being penetrated by the solar rays, it would kindle fire in things apt to burn placed on the opposite side of the air.

Because enclosed fire soon dies.

And so too in the hollows of the grain.

Show me the paper not moving at the same obliquity where the axis moves. When the power of the friction overcomes the power of the weight, then the body will have no motion.

Golden Chain. Discourse.

Heat and cold come from the nearness and withdrawal of the sun.

Heat and cold generate motion in the elements.

No element has in itself weight or lightness.

Weight and lightness, without increase, are born from the motion of the element within itself, in its rarefaction and condensation; as is seen in the air in the generation of clouds by means of the moisture infused in it.

Increased weight and lightness are made along a perpendicular line from one element into another. And these accidents gain the more power the more life they have, and the more life the more they have of motion.

This motion arises because the rarer cannot resist nor sustain upon itself the denser.

Lightness is born from the heavy, and the heavy from the light: in one same instant repaying the benefit of their creation; and they grow the more in power the more they grow in life, and the more in life the more they have of motion; and in one same instant they destroy one another with common vengeance for their death.

It is proved: the light is not generated unless it is joined with the heavy, nor is the heavy generated unless it is continued with the light. But the light has no being unless it is beneath the heavy, nor is the heavy anything unless it is above the light. And this too holds among the elements. And let there be given as an example a quantity of air beneath the water; then it will follow that the water immediately acquires weight — not that it changes from its first being, but because it does not find due resistance; then it descends into the place of the underlying air, and the air fills the void that the generated weight leaves of itself.

The adversary says that heat is from the element of fire, which generates it without the sun, as in the night when the sun does not warm us. It is answered that summer and winter teach us who it is that warms and cools us, whether the sun or the element fire.

Lightness is born from the heavy in the same instant that the heavy is born from the light.

The air is a liquid body clothed by a spherical surface, and is penetrated by the solar rays, which contract in their converging, and warm the more the more they contract toward the point of their meeting.