The heart that delights in God and longs only to see His glory advance will seldom be conscious of sacrifice. God in His wisdom asks that we first love Him and then live in keeping with that core value. He does not want His people to think of what they do as sacrificial, even though from the world's point of view it may be just that. Gratitude for grace of God will always be found near the center of the Biblical Christian's most powerful motivations.
By definition, if man contributes anything toward acceptance by God, he loses everything. God expects man to be the recipient, not the originator. Jesus paid it all, not 99% of it. Paul wrote, "For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast