Time is the only capital of those who just have their inteligence as fortune.

The key to all sciences is unquestionably the question mark. To the word How? we owe most of our greatest discoveries. Wisdom in life may perhaps consist in asking ourselves on all occasions: Why?

Several sorts of memory exist in us; body and mind each possesses one peculiar to itself. Nostalgia, for instance, is a malady of the physical memory.

A grass blade believes that men build palaces for it to grow in. Grass wedges its way between the closest blocks of marble and it brings them down. This power of feeble life which can creep in anywhere is greater than that of the mighty behind their cannons.

The winter's frost must rend the burr of the nut before the fruit is seen. So adversity tempers the human heart, to discover its real worth.

Evasion is unworthy of us, and is always the intimate of equivocation.

Gratitude is a fool's word; we find it in the dictionary, but it is not in the heart of man.