The highest activity a human being can attain is learning for understanding, because to understand is to be free.
Baruch SpinozaMan can, indeed, act contrarily to the decrees of God, as far as they have been written like laws in the minds of ourselves or the prophets, but against that eternal decree of God, which is written in universal nature, and has regard to the course of nature as a whole, he can do nothing.
Baruch Spinoza