When you lose interest in anything, you also lose the memory for it.

A talent can be cultivated in tranquility; a character only in the rushing stream of life.

Poetry is the universal possession of mankind, revealing itself everywhere, and at all times, in hundreds and hundreds of men.

When the boy begins to understand that the visible point is preceded by an invisible point, that the shortest distance between two points is conceived as a straight line before it is ever drawn with pencil and paper...the fountain of all thought has been opened to him...the philosopher can reveal him nothing new, as a geometrician he has discovered the basis of all thought.

If a man or woman is born ten years sooner or later, their whole aspect and performance shall be different.

Art is long, life is short; judgement difficult, opportunity transient.

What I possess I would gladly retain. Change amuses the mind, yet scarcely profits.