
Do, mean, etc. something for the best
Good Intentions
The phrase implies the person is trying to help, even if the actions might not be favorable to everyone.

She sold the car for the best, thinking public transport would be healthier.
Unintended Results
Understand that actions done for the best may still lead to unexpected, sometimes negative, consequences.

I chose the job for the best, but sadly it didn't work out.
Hindsight Explanation
It's often used to justify a decision after the outcome is known, regardless if it was good or bad.

He didn't know it'd cause trouble; he meant it for the best.
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