Of the four elements water is the second in weight and the second in respect of mobility. It is never at rest until it unites with the sea.

If you are on the side whence the wind is blowing you will see the trees looking much lighter than you would see them on the other sides; and this is due to the fact that the wind turns up the reverse side of the leaves which in all trees is much whiter than the upper side.

I have solved what color is, however ; I still have no idea about what line is.

Every action needs to be prompted by a motive. To know and to will are two operations of the human mind. Discerning, judging, deliberating are acts of the human mind.

It is no small benefit on finding oneself in bed in the dark to go over again in the imagination the main lines of the forms previously studied, or other noteworthy things conceived by ingenious speculation.

In life beauty perishes, but not in art.

To enjoy - to love a thing for its own sake and for no other reason.