I am certain that I have been here as I am now a thousand times before, and I hope to return a thousand times... Man is a dialogue between nature and God. On other planets this dialogue will doubtless be of a higher and profounder character. What is lacking is Self-Knowledge. After that the rest will follow.

Belief is not the beginning of knowledge - it is the end.

Waste not a day in vain digression; with resolute, courageous trust seek every possible impression and make it firmly your posession you'll then work on because you must.

Piety is not a goal but a means to attain through the purest peace of mind the highest culture.

Behavior is the mirror in which everyone shows their image.

All theory, dear friend, is gray, but the golden tree of life springs ever green.

Whoever, in middle age, attempts to realize the wishes and hopes of his early youth, invariably deceives himself. Each ten years of a man's life has its own fortunes, its own hopes, its own desires.