If it is not right, do not do it, if it is not true, do not say it. For let thy efforts be — - Marcus Aurelius

Let no act be done at haphazard, nor otherwise than according to the finished rules that govern its kind.

So remember this principle when something threatens to cause you pain: the thing itself was no misfortune at all; to endure it and prevail is great good fortune.

Not to feel exasperated or defeated or despondent because your days aren't packed with wise and moral actions. But to get back up when you fail, to celebrate behaving like a human—however imperfectly—and fully embrace the pursuit you've embarked on.