This question set me free.
I believe there are 3 things that don’t rely on the bounds of time:
Love
Nostalgia
Forgiveness
If we can learn to remember the feeling of forgiveness - the release of emotional burden - before something has even happened it allows us to let go of any expectation for ourselves or others to let us down.
I got to a point where I forgave my wrongdoers of their past actions only to realize that I wasnt healed when they’d repeat a pattern. in forgiving tomorrow I release the expectation (without excusing action) to be let down. it’s a choice to accept them (me) as they (I) are (am).