Even a faith the size of a mustard seed will have extraordinary results. A disciple, like a slave, must recognize one's proper place in relationship to the King and serve out of loyalty to the relationship and not out of expectation for the reward. A relationship with Christ is the result of a relationship based on the grace of the Master and not on the worth of the servant. The Principles Gratitude for the grace of God should outweigh all other motivations. I suspect if something that tangible happened, you would really feel the gratitude, etc.
Faith ought to be demonstrated by obedience.
If I believe God, I'll do what He wants me to do. Don't expect extra reward for expected service. The issue is my attitude. If it is primarily rewards, I am a mercenary. We need balance.