Romans 4:20

Staggered not. Or, “wavered not,” “doubted not.” The Greek implies a mental struggle.

Was strong in faith. Literally, “was strengthened in [his] faith,” or “was strengthened by [his] faith.” This may be understood to mean that Abraham’s faith was strengthened. His faith grew as it was exercised. Or it may mean that Abraham himself received power through his faith. Unbelief did not cause him to waver, but on the contrary his faith made him strong. Paul elsewhere affirms that “through faith also Sara herself received strength to conceive” (Heb. 11:11). This would seem to confirm the second interpretation, though the first is undoubtedly true of Abraham’s experience.

Giving glory to God. This does not necessarily imply a verbal expression of praise, but may refer to anything that tends to God’s glory, whether in thought, word, or deed (see Joshua 7:19; Jer. 13:16; Luke 17:18; John 9:24; Acts 12:23). Abraham gave glory to God by his firm confidence in God’s promises. Thus he acknowledged God’s omnipotence. In this way all who believe in the divine promises do honor to God. They bear testimony that God is worthy of confidence. Abraham also gave glory to God in action as well as in thought by his prompt obedience (Gen. 17:22, 23).