Let no one who can be his own belong to another.
Alterius non sit qui suus esse potest. (Let no man belong to another that can belong to himself.)
Determined will is the beginning of all magical operations. It is because men do not perfectly imagine and believe the result, that the (occult) arts are so uncertain, while they might be perfectly certain.
The art of medicine cannot be inherited, nor can it be copied from books
Nature also forges man, now a gold man, now a silver man, now a fig man, now a bean man.
Life is like music, it must be composed by ear, feeling and instinct, not by rule. Nevertheless one had better know the rules, for they sometimes guide in doubtful cases, though not often.