God: "I looked for someone to take a stand for me, and stand in the gap" (Ezekiel 22:30)
It is not for me to rise up and go in rebellion against His wishes. If He be a father, let me note His commands, and let me reverentially obey. If He has said "Do this," let me do it, not because I dread Him, but because I love Him. And if He forbids me to do anything, let me avoid it.
To choose a career on selfish grounds is probably the greatest single sin that any young person can commit, for it is the deliberate withdrawal from allegiance to God of the greatest part of time and strength.