The young should early be trained to bear being left alone; for it is a source of happiness and peace of mind.

A man finds himself, to his great astonishment, suddenly existing, after thousands and thousands of years of non-existence: he lives for a little while; and then, again, comes an equally long period when he must exist no more. The heart rebels against this, and feels that it cannot be true.

Just remember, once you're over the hill you begin to pick up speed.

Do not shorten the morning by getting up late, or waste it in unworthy occupations or in talk; look upon it as the quintessence of life, as to a certain extent sacred. Evening is like old age: we are languid, talkative, silly. Each day is a little life: every waking and rising a little birth, every fresh morning a little youth, every going to rest and sleep a little death.

What makes people hard-hearted is this, that each man has, or fancies he has, as much as he can bear in his own troubles.

Astrology furnishes a splendid proof of the contemptible subjectivity of men in consequence whereof they refer everything to themselves and from every idea at once go straight back to themselves. Astrology refers the course of celestial bodies to the miserable ego; it also establishes a connection between the comets in heaven and the squabbles and rascalities on earth.

The principle of contradiction establishes merely the agreement of concepts, but does not itself produce concepts.