I find it odd that in Tennis  - zero is not called "zero", or "nil", or "nothing" -  it's  called "love".

In Christianity,  when there's nothing of us left, when we empty ourselves of "self", when there's no pride, no agendas of our own, hidden or otherwise, when we truly "die daily" -  this is love! In it's purest form! Because love always involves sacrifice.  Remember what Jesus said? Greater love has no man than this - that he lay down his life...for a friend.  Who is our best friend we'll ever have? The Lord himself! If we lose (give up) this life for his sake, we'll find true life and riches, not the fleeting,  temporary life the world devotes itself to (self). 

So remember that,  next time you're called to sacrifice- more of yourself,  be it your time, money, or a thing (car or favorite tie). Love isn't love till you give it away.