How can I know God's heart? Is it by looking to my own heart? No; but by learning it in the gift of His Son. The God we have to say to is the God who has given His Son for sinners; and if we do not know this, we do not know Him at all. "He that spared not His own Son, but delivered Him up for us all, how shall He not with Him also freely give us all things?"
Do not be saying to God, "make me as one of Thy hired servants"; all true service must result from the knowledge of Himself. Do not be putting the estimate of your own hearts on God's goodness. Our wretched hearts have a tendency to turn back to legalism and call it humility. The only real humility and strength and blessing is to forget self in the presence and blessedness of God.