play the hand (one) is dealt

To accept, deal with, and make the most of one's current situation or circumstances; to make use of that which one is afforded or has available. I know you feel unsatisfied with your life at the moment, but we all have to play the hand we're dealt. Just keep working hard and things are bound to improve! I never asked to be responsible for the business, but I'm going to play the hand I was dealt.