Believe on our thoughts !!!

Sometime we don't believe on our thoughts, is this happens with you also?

It happens with me lots of time. I don't believe what i have thought of. For example if i think this is the reason and thats why it is not happening in this way, and I don't believe on that thought, at first, i.e. i will not believe on the reason.

Does this happens with you also? I think yes it happens with most of the people, in terms of percentage it will be 90-95% or what?