Isaiah 40:31 NIV
31 but those who hope in the Lord will renew their strength. They will soar on wings like eagles; they will run and not grow weary, they will walk and not be faint.
This scripture is telling us that when we have faith in the Lord, we will have success. For example, Abraham had faith in the Lord that Sarah would still give birth to their son, Isaac, despite their old age. What you can see in this example is that Abraham and Sarah had success which was Isaac because they had faith in God. Also, we have to have faith with everything we do in our daily lives. We have to have faith to get a good grade on that test, we have to have faith that God will come through when we are ill, we have to have faith in God that He will provide us with are needs. So, I hope you have faith in the Lord so you will have success.