Necessity is a guardian in Nature.

I abhor the supreme folly of those who blame the disciples of nature in defiance of those masters who were themselves her pupils

I have from an early age abjured the use of meat, and the time will come when men such as I will look upon the murder of animals as they now look upon the murder of men.

King of the animals — as thou hast described him — I should rather say king of the beasts, thou being the greatest — because thou hast spared slaying them, in order that they may give thee their children for the benefit of the gullet, of which thou hast attempted to make a sepulchre for all animals; and I would say still more, if it were allowed me to speak the entire truth.

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.

Painting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seen.

A wave is never found alone, but is mingled with as many other waves as there are uneven places in the object where the said wave is produced.