Matthew 6:3,4

But whenever you give on behalf of the poor,

Do not let your left hand know what your right hand does,

That your almsgiving may be in secret,

And your Father who sees in secret will recompense you.”

Whenever the disciples give, (the fact that they will give is assumed), then it is to be done in such secrecy that even the left hand will not know what the right hand has done. It is thus not only to be secret but totally without any idea of self-congratulation. It will, as it were, be hidden even from themselves. It will pass from the mind almost before it happens so that the left hand will never find out. But the idea is not that they will do it in order to obtain heavenly credit. They will rather do it because it is the good and right thing to do, it is God-like. It is the type of giving that neither wants nor asks for anything in return that brings the greatest reward, for its reward is the growth of true righteousness. The giver has become by it a better person. And they will not lose by it, for it is known to ‘their Father', Who will see it and recompense it by His gracious working in their lives in a way far greater than they deserve or will even understand.

We should note here that God does not reward us with things that will make us proud and arrogant, such as physical thrones and crowns (any offer of these is to be interpreted spiritually). He gives us what is far more substantial, a delight in service and obedience, and an ability to love. He makes us faithful servants who will hear His ‘well done'. He begins to make us like Himself (1 John 3:2).