What God Promises, He is Able to Perform

[Abraham] staggered not at the promise of God through unbelief, and he therefore staggered not because he considered not the frowns and discouragements of second causes; he disputed not; he did not hold any self-consultation about it, did not take time to consider whether he should close with it or no, did not hesitate nor stumble at it, but by a resolute and peremptory act of his soul, with a holy boldness, ventured all upon the promise. He took it not for a point that would admit of argument or debate, but presently determined it as a ruled case, did not at all hang in suspense about it: he staggered not through unbelief. Unbelief is at the bottom of all our staggerings at God's promises. It is not the promise that fails, but our faith that fails when we stagger…. Though weak faith shall not be rejected, the bruised reed not broken, the smoking flax not quenched, yet strong faith shall be commended and honored. The strength of his faith appeared in the victory it won over his fears. And hereby he gave glory to God; for, as unbelief dishonors God by making him a liar (1 John 5:10), so faith honors God by setting to its seal that he is true, (John 3:33)…. He was fully persuaded that what God had promised he was able to perform…[and] was carried on with the greatest confidence and assurance…." – Matthew Henry