You should prefer a good scientist without literary abilities than a literate one without scientific skills

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.

He who does not understand the supreme certainty of mathematics is wallowing in confusion.

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.

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.

One day the world will look upon research upon animals as it now looks upon research on human beings.

Now do you not see that the eye embraces the beauty of the whole world? It counsels and corrects all the arts of mankind... it is the prince of mathematics, and the sciences founded on it are absolutely certain. It has measured the distances and sizes of the stars it has discovered the elements and their location... it has given birth to architecture and to perspective and to the divine art of painting.