1) At the core of Romans 4:18 is Abraham's response to God's promise that he would become the father of many nations. Abraham believed God, and this response is how we need to engage with God on a daily basis. When God communicates something to us through His word, we need to believe Him.

2) The next portion of the verse is mind-blowing. We are encouraged to believe whatever God says to us, whether through His word, our lives, or through Jesus, even if it seems utterly impossible. The point is, when God does something, it's undeniable. The reason it's undeniable is because it couldn't happen—it's impossible—but God makes it possible.

3) In Romans 4:19, it says that Abraham believed God, even though he knew it was impossible because he was too old to have children. From a logical, practical, scientific, and academic point of view, it was impossible. But nothing is impossible with God, and Abraham knew that if it was going to happen, it would have to be a miracle.