it happens
Worrying is not necessary, since it is common to make this mistake or for this to occur.
John said, "I'm sorry for knocking you over." Linda said, "It's okay. It happens."
It's not that I'm afraid to die. I just don't want to be there when it happens. Woody Allen
Make the best use of what is in your power, and take the rest as it happens. Epictetus
A man either lives life as it happens to him, meets it head-on and licks it, or he turns his back on it and starts to wither away. Gene Roddenberry
In politics, nothing happens by accident. If it happens you can bet it was planned that way. Franklin D. Roosevelt
Everything is funny as long as it happens to someone else. Russian Proverb
Whether bad or good, christ doesn't say why it happens. Corsican Proverb