God assured Abraham that He was Abraham's "exceeding great reward" (Gen. 15:1).
The king of Sodom had offered Abraham all the riches that Abraham and his servants had brought back, but he turned them down. Notice that the tense is not past or future, but present. Not "I was" or "I will be" but "I am"--"I am thy shield, and thy exceeding great reward" (v. 1).
We see from God's promise to be Abraham's reward that God never permits His children to lose when they honor Him and seek His glory. God never leaves His child without spiritual blessings after His child has taken a stand for the glory of God.
Although Abraham had no children at this time, his faith in the Lord is recorded in verse 6: "He believed in the LORD; and he counted it to him for righteousness."
Because of Abraham's faith in God, he was able to look into the future and trust God for everything.
Ephesians 1:3 tells us that present-day believers have been blessed with "all spiritual blessings in heavenly places in Christ."
But we, too, must set our eyes on the future. We must be those who look to their reward for glorifying God, rather than looking at the temporal satisfactions of the present.