Patience

There can be a moment in any individual's life that they realize they have done their part and they can only wait for the outcome. I believe that is the most important lesson anyone can ever get.

It is not as simple as it is being written here. That moment usually happens after a failure due to not being patient and only then the importance of "waiting" is realized.
When that moment happens and it was fully embraced, then the person will always realize how crucial it is to "wait" and not push. Specially when it is waiting for emotions of another human being.

I will try to write on this more, but for now, when you really want something to happen, and it's not, make sure you've done your part, and then wait.
I promise, if it's gotta happen, it will happen!