There is no success without sacrifice. If you succeed without sacrifice it is because someone has suffered before you. If you sacrifice without success it is because someone will succeed after.
Mathematics is an obscure field, an abstruse science, complicated and exact; yet so many have attained perfection in it that we might conclude almost anyone who seriously applied himself would achieve a measure of success.
Everybody has a calling. And your real job in life is to figure out as soon as possible what that is, who you were meant to be, and to begin to honor that in the best way possible for yourself.