Because they are specifically to that one person.
Why do I want to climb that mountain? Because I have a specific interest and goal to do so. I'd rather not wash dishes all day because I have a dream.Accepting your failure to be intolerant isn't an excuse to be like that, unless you want to change.
george washington had a dream, he went on to become black, invent the peanut, change his name, and then get shot.