The one way to lead a happy life is to be an optimist. Before starting a task do think "ah! I am ready to face anything. iam a daring personality" then you are the succeder.
Consider an "eraser".
If you think it will be used by one who makes mistakes then its wrong, change yourself. instead,
If you think that it will be used by one who tries to correct his mistake,then you are correct.
see the difference and be an optimist
by your friend........