There are many occasions when the muscles that form the lips of the mouth move the lateral muscles that are joined to them, and there are an equal number of occasions when these lateral muscles move the lips of this mouth, replacing it where it cannot return of itself, because the function of muscle is to pull and not to push except in the case of the genitals and the tongue.

As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.

He turns not back who is bound to a star.

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

When you put your hand in a flowing stream, you touch the last that has gone before and the first of what is still to come.

Simplicity is the ultimate sophistication.

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