let it go?

The therapist says that if I am going to be successful that I need to let the little things that are bugging me go.
He says I have no way of knowing exactly what impact that things are going to make until surgery is said and done with and that my next few miles of this journey only get harder.
He says that this type of life changing even thins out the weak and strengthens the strong. So true I am sure but sad none the less.

So, I ask what happens when some of it that bugging you - you just dont want to let go cause you still want better? Do you just let it go and see what happens? or write it off the loss you kinda think, but hate that it will be?

He says that the people who change the most arent those who go through the journey its those who go trough it with you, or choose the side roads. Now im worried...

I have 3 more visits before my surgery can be approved.