“You cannot live a perfect day without doing something for someone who will never be able to repay you”
“You can't live a perfect day without doing something for someone who will never be able to repay you.”
“You can’t live a perfect day until you do something for someone who will never be able to repay you.”
“You have not lived a perfect day, unless you've done something for someone who will never be able to repay you.”
“You have not lived today until you have done something for someone who can never repay you.”
“You don’t marry someone you can live with, you marry the person who you cannot live without.”