Faith is so simple.
There is nothing more to it than trusting in God rather than in ourselves. You would think it is fairly obvious that to have a good relationship with God, you have to trust God. Yet we do such things even when we know that our small offerings of good deeds are not very impressive gifts compared with all that we have received from God. And they never really make up for our unfaithfulness in other ways. In any case, it is not a very good idea, if you are trying to establish a relationship of trust with anyone to try to gain a favour by offering something in return.