READ: Romans 4:17 That is what the Scriptures mean when God told him, “I have made you the father of many nations.” This happened because Abraham believed in the God who brings the dead back to life and who creates new things out of nothing.
In Romans 4:17 Abraham was praised for his faith. Abraham had a keen ability to not look at his current circumstances as though they would always be that way. He could have looked at himself and said "I'm too old to be a Father" or looked at his wife and said, "she's too old to conceive and give birth to a child" or "we just don't have the energy to raise a child - God must have us mixed up for another couple". But he didn't! He did have a moment of trying to make the promise come into fruition out of his own doing (when he had a child with his wife's servant Hagar). The child that came from that union (Ishmael) was not the promised child that the descendants as many as the stars in the sky would come from.
Sometimes we try to take matters into our own hands and certainly Abraham's life was a lesson to us to TRUST GOD and LET HIM DO HIS WORK IN HIS TIME. But Abraham's life also reminds us that our current situation is not going to be the outcome. When God promises us something and we wait and we wait.... even in the waiting we can KNOW that our future is held in the hands of God and the plans and purposes that He has for us will come to pass.
Are you facing something hard right now? Are you clinging to the promises of God for your life... but getting weary and the waiting is getting long? Believe me - do I ever understand that! But looking at Abrahams life and using his keen ability as an example to ourselves... we can look at our current situation and not get stuck there. We can KNOW that a better day is coming when the promise will be fulfilled. Hang on and trust and don't lose hope!