Don't treat the static as an adversary, which means that the facts that have happened cannot be changed. Don't make trouble with yourself with regrets or the desire to change history.
Don't choose the fleeting as a friend.
I think we should not treat the present time as a friend and linger, because it won't leave you like a friend, and it will leave you sooner or later, so we should seize the present time and do more things. You can't regard the past time as an adversary, because the past will never come again. You just regret, regret and grieve for what happened in the past, and it won't change. Similarly, don't immerse yourself in the achievements made in the past. That was the past and won't change because of you!