To every separate person a thing is what he thinks it is – in other words, not a thing, but a think.
A word of advice. If, as a young man, student, you are tormented by a desire for women, it is best to get out into the fresh air as much as possible.
Duty is what no-one else will do at the moment.
If they don't depend on true evidence, scientists are no better than gossips.
Behind their dark glass, the mad own nothing.
Morality is seldom a safe guide for human conduct.