"A clever man commits no minor blunders.""A correct answer is like an affectionate kiss.""A creation of importance can only be produced when its author isolates himself, it is a child of solitude.""A man's manners are a mirror in which he shows his portrait.""A noble person attracts noble people, and knows how to hold on to them.""A person hears only what they understand.""A person places themselves on a level with the ones they praise.""A really great talent finds its happiness in execution.""A useless life is an early death.""Age merely shows what children we remain.""All intelligent thoughts have already been thought; what is necessary is only to try to think them again.""All the knowledge I possess everyone else can acquire, but my heart is all my own.""All theory, dear friend, is gray, but the golden tree of life springs ever green.""All things are only transitory.""An unused life is an early death.""As soon as you trust yourself, you will know how to live.""Be above it! Make the world serve your purpose, but do not serve it.""Beauty is a manifestation of secret natural laws, which otherwise would have been hidden from us forever.""Beauty is everywhere a welcome guest."