Motivation

Sometimes it just seems that I get these sporadic bursts of energy and motivation that last until I make that first excuse for myself. As soon as that excuse appears in my mind, it preys upon me and gives me all kinds of leeway that causes me to easily give up on whatever it is I'm doing. It's in everything, from sports, to friendships, to classes. Am I so easy, so little of heart to just be someone who gives up and leaves it to a pathetic excuse like that?