and being fully convinced that what He had promised He was also able to perform.
Romans 4:20-21 (NKJV)
Where you finish is much more important than where you start, this is true in many different settings. In auto racing a driver may start in the pole position but have a bad race and even end up in last place. On the other hand, someone could start in last place and do well enough to finish in first place. Another example would be learning some new skill or studying a subject in school. When you start you would obviously not know how to perform the skill or you would not understand the subject, but if you applied yourself you could master the skill and learn the subject.
In Romans 4 we read about the promise that God gave to Abraham about having a son. When God first gave this promise to Abraham in Genesis 17, Abraham fell on the ground laughing! In Genesis 18 we see that Sarah also laughed when she first heard God's promise of a son. Laughing at the promise of God does not sound like something someone who believes what God says does, it sounds like someone who does not believe what was said. The good news is that after Abraham's initial reaction he did become strong in faith. Abraham and Sarah did not start so well but they did finish in faith.
At first Abraham did not believe what God had said. But Abraham developed in his faith to the point that he was not laughing at the promise but expecting the fulfillment. How about you? What is happening in your life and what does God's Word have to say about it? You may look at God's Word and what God has said about your situation and it looks as impossible as God's promise did to Abraham. But if you continue to focus on what God has said and continue to speak God's Word, you too can finish in faith and receive the fulfillment of the promise and then you will really have something to laugh and rejoice about!