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

It is asked whether the saints stand naked.

Man has a desire to understand whether woman is yielding to the lust he seeks; and understanding that she is, and that she likewise desires the man, he entreats her and puts his desire into effect, and he cannot understand it unless she confesses, and in confessing she couples.

The point has no middle, and its bounds are nothing: it follows that the point is indivisible, nor is it part of any thing; therefore all points joined together are not divisible.

The point has no middle, and its bounds are nothing: and all 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 be moved, it describes the line.

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

Because fire shut in dies at once.

And so it is in the hollows of the grain.

Show me the paper not moving at the same obliquity at which the axle moves. When the power of 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 the withdrawal of the sun.

Heat and cold generate motion in the elements.

No element has in itself gravity or levity.

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

Gravity and levity, once increased, 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 motion they have.

Which motion is born because the rarer cannot resist nor sustain upon itself the denser.

Levity is born from the heavy, and the heavy from the light: in one and the 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 and the same instant they destroy one another with a shared 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 in the elements. Let there be given for example a quantity of air beneath the water; then it will follow that the water immediately acquires gravity: not that it changes from its first being, but because it does not find due resistance; then it descends into the place of the air lying beneath, and the air fills the void that the generated gravity leaves of itself.

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

Levity 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 it is penetrated by the solar rays, which draw together at their meeting, and warm the more the more they draw together to the point of their meeting.