“You do what you have to do, to do what you want to do.”
“One often has to do what they have to do in order to do what they want to do; however if you only do what you want to do then you will never do what you have to do!”
“Do what you have to do, to do what you want to do!”
“Do what you want, do what you will, do what you have to, do what you think you cannot.”
“Do what you have to do so that you can be what you want to be”
“You can't do what you want to, so just do what you have to.”