Romans 4:19-22, "And not being weak in faith, he did not consider his own body, already dead (since he was about a hundred years old), and the deadness of Sarah’s womb. He did not waver at the promise of God through unbelief, but was strengthened in faith, giving glory to God, and being fully convinced that what He had promised He was also able to perform."
Abraham did NOT consider what he was facing. You could say that he was rude and inconsiderate of his circumstances; he paid them no attention! He only considered God’s words to him. Scripture says he was strong in faith because he did not think on his infertility issue or doubt God's ability to heal it.
The problem with considering things is that once you begin, eventually you will have to "un-consider" those things to move forward. It is a whole lot better not to consider lack or failure in the first place.
For example, if you knew the brakes in your car were not functioning you would not get in the vehicle to drive. You would not put yourself in a problematic and dangerous situation by avoiding the ordeal altogether. Yet how many times do we hash negative outcomes over in the "vehicle" of our mind knowing it will cause our faith to wreck?
Instead, let's save ourselves from the stress, torment, and doubt and not get in that car! Look away and consider Jesus, the author and finisher of our faith (Hebrews 12:2). Refuse to complicate your thought life. Keep your focus on God's forever faithful nature and His covenant promises.
God tells us to bring every thought that we have into captivity to the obedience of Christ (2 Corinthians 10:4-5). He also says to condemn every word that rises up against us (Isaiah 54:17). As a non-considerer immediately reject any unbelief, even the slightest hint. Abraham did not consider his or his wife's body, age, weakness or inabilities. He just acted in faith being fully convinced that God would perform His promises.
Don't try to figure out the "how", trust the "who". When you do you are glorifying God and your faith is built up to receive from Him. God’s promises are yes and amen!
"Therefore, holy brethren, partakers of the heavenly calling, consider the Apostle and High Priest of our confession, Christ
Jesus" (Hebrews 3:3).
He is the same yesterday, today, and forever.