Few people have the imagination for reality.

Is it not enough that we cannot make one another happy, must we also rob one another of the pleasures that any heart may permit itself now and then? And name me a person who in a bad mood will be decent enough to hide it, to bear it alone, without destroying the joy around him. Is it not rather an inner dissatisfaction with our own unworthiness, a dislike of ourselves that is always associated with envy aggravated by foolish conceit? We see people happy and not made happy by us, and that is unbearable.

In happy ignorance, I sighed for a world I did not know, where I hoped to find every pleasure and enjoyment which my heart could desire; and now, on my return from that wide world... how many disappointed hopes and unsuccessful plans have I brought back!

We see only what we know.

A reasonable man needs only to practice moderation to find happiness.

This being busied with thoughts of immortality is for the noble classes and especially for women with nothing to do. A solid person, though, someone who already intends to be something worthy here, and who therefore has to strive daily, has to struggle and work, gives the world to come a rest.

Insofar as he makes use of his healthy senses, man himself is the best and most exact scientific instrument possible. The greatest misfortune of modern physics is that its experiments have been set apart from man, as it were, physics refuses to recognize nature in anything not shown by artificial instruments, and even uses this as a measure of its accomplishments.