“Aphorism. Noun; Predigested wisdom.” – Ambrose Bierce

An aphorism is a terse saying embodying a general truth, or astute observation. For a saying to be called an aphorism, it has to be memorable and spoken or written in a laconic sense.

“I have forgotten my umbrella.” – Friedrich Nietzsche

Or rather,

“The aphorism in which I am the first master among Germans, are the forms of ‘eternity’; my ambition is to say in ten sentences what everyone else says in a book, or what everyone else does not say in a book.” – Friedrich Nietzsche