(idiomatic) It is not possible to repeat past experiences, as time changes all things.

Alternative form of you can't put the toothpaste back in the tube

Once something is said or done, it cannot be unsaid or undone.

(humorous) Expressing reproach when somebody harms or damages something.

Alternative form of one can't hold two watermelons in one hand

It is impossible to change people's habits, traits, or mindset.

If you cannot handle the pressure, you should not remain in a position where you have to deal with it.

In order to achieve something, it is inevitable and necessary that some mistakes are made or some sacrifices must occur.

One should not attempt to take on more than one can handle.

It is not possible to produce something refined, admirable, or valuable from something which is unrefined, unpleasant, or of little or no value.