We share our lives freely with people we choose and others who simply enter into it. In either case, we just want fairness; when we give of ourselves—even without making it an issue—we expect the same courtesy in return.
We can't spend our lives looking back on our mistakes or the mistakes of others; it's easy to blame and condemn, but we grow when we learn to correct our errors gracefully.
It may often seem that we are waiting to achieve something or to perform a task which only we can perform; maybe one day this will be clear, but I am sure, it is not today.
There are things which we need in our lives, and things which we need to remove; we need enough raw determination to let go of the trouble, and to hold fast to the necessity.
As our knowledge and experiences increase, our universe expands with them; let's hope that we are able to maintain a valid perspective during the expansion.