Romans 5:3-5 3 And not only so, but we glory in tribulations also: knowing that tribulation worketh patience;
4 And patience, experience; and experience, hope:
5 And hope maketh not ashamed; because the love of God is shed abroad in our hearts by the Holy Ghost which is given unto us.
This same hope allowed Abraham to have a child in his old age. Romans 4:18 18 Who against hope believed in hope, that he might become the father of many nations, according to that which was spoken, So shall thy seed be.