A passage from Epictetus
Epictetus, Enchiridion 29
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In every affair consider what precedes and follows, and then undertake it. Otherwise you will begin with spirit indeed, careless of the consequences, and when these are developed, you will shamefully desist.
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At dawn, when you have trouble getting out of bed, tell yourself: 'I have to go to work — as a human being.'
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Take care not to be Caesarified, or dyed with purple; for it does happen. Keep thyself then simple, good, pure, serious, free from affectation.
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It is a man's special privilege to love even those who wrong him.