Seneca

“Travel and change of place import new vigor to the mind.”

Baruch Spinoza

“Love is pleasure accompanied by the idea of an external cause, and hatred pain accompanied by the idea of an external cause.”

Ludwig Wittgenstein

“Whereof one cannot speak thereof one must be silent.”

Socrates

“Wisdom begins with wonder.”

Plato

“Tries and fields tell me nothing: men are my teachers.”