"But whether I become a believer or remain an agnostic, my belief or disbelief must derive its source from within, not from without. I, myself, must create its symbols. The transcendental is that which produces its own form. I will never discover its secret if I do not find it in my own heart; if I do not possess it already I shall never be able to acquire it."

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If you want to improve, be content to be thought foolish and stupid with regard to external things. Don't wish to be thought to know anything; and even if you appear to be somebody important to others, distrust yourself. For, it is difficult to both keep your faculty of choice in a state conformable to nature, and at the same time acquire external things. But while you are careful about the one, you must of necessity neglect the other

— Epictetus