Don't demand that things happen as you wish, but wish that they happen as they do, and you will go on well.
This quote sums up the Stoic approach to serenity. Epictetus observed that most suffering comes from resisting reality — insisting that life follow our plans. But the world is not ours to control. What we can control is our attitude. Accepting what is does not mean giving up — it means working with the present, not against it.
Align your will with reality, and you'll walk through life with far less resistance.
"Grant me the serenity to accept the things I cannot change..."