How could you be where you are if you hadn't been where you were?
The question trips lightly off the mind's tongue, together with the implication that since there is nothing that can be done, why worry about or extol it? And there are a hundred sage approaches to pride and regret.
But seriously, how could you be where you are if you hadn't been where you were?
Every smile flows from every tear; every tear is nothing but what once was smiling. And only an intellectual would say that such things are endlessly interlocking: It takes more than one thing to 'interlock,' and how many things are there, really?
How nice it is to be happy!