What holds us back?

What holds us back?
I still wonder, All we have is false notions and they never change with changing times either. All we want is to keep it to ourselves; Be it the agony, the sadness or our happiness.
The smile doesn’t cost us and still it takes a hundred difficulties to have one.
Its good that you don’t think and Its bad that I do. The distinction between us is I am a flowing river and You are not.
There goes my sadness, my pain ,my anguish , my loneliness.

What holds us back ?
What holds us back is our feebleness because we have endless list of ifs and buts.

What holds us back is us?