I sometimes wonder..

I wonder, why am I sometimes acting so fulish?
I never finish enything.. yes ok, I am finishing some work in my life, but, why I don't come to an good end something I want.. I sometimes leave things half done.. I don't know why?
Sometimes, I lose faith when I came near the end of some job, but, at the end, I think it is not so good, and I start doing something diferent leaving my fork half done :(

I someone understood me :)