"When I see someone in a state of anxiety, I say, ‘What is it that he wants?’ For unless he wanted something that was not within his power, how could he still be anxious?"
"If the things, then, that lie outside the sphere of choice are neither good nor bad, and those that lie within the sphere of choice are subject to our control, and no one can either take those away from us or impose them on us unless we wish it, what room is left for anxiety?" - Epictetus.
"We are in the habit of exaggerating, or imagining, or anticipating, sorrow. What I advise you to do is, not to be unhappy before the crisis comes; since it may be that the dangers before which you paled as if they were threatening you, will never come upon you."
“The fool, with all his other faults, has this also, he is always getting ready to live.” - Seneca