With God all things are possible.

Genesis 17.17
Then Abraham fell on his face and laughed, and said in his heart, “Shall a child be born to a man who is one hundred years old? And shall Sarah, who is ninety years old, bear a  child? ”

--> At this time, Abraham and Sarah were well advanced in years. God spoke to him and said they will have a son and they are to name him Isaac.

Abraham laughed because its impossible and there's no way a child can be born to such an old couple. Romans talks about the deadness of Sarahs womb and the weakness of Abrahams body. Naturally speaking theres no way for this to happen. God introduced himself to Abraham in the beginning of this chapter as Elshaddai, the Almighty God.  All powerful God.  Gods promise wasn't based on Abraham or Sarahs strength. It was based on His strength. God told Abraham I am your strength and you will have a child because of my strength. Finally Abraham believed God and was fully persuaded that God was able to do what He has promised.

Friend, like Abraham you may be surrounded by impossibilities, doubts and negative reports and you think there's no way Gods promises can ever be fulfilled in my life. As long as you look at yourself and at the things around you, you will question Gods promises like Abraham did. The moment you look and behold God, his word, his wisdom, his riches, his strength, his power, his love and his finished works and know that He is well able, you will see the manifestation of Gods promises in your life.  Fix your eyes on Jesus, on what he has said, on what he has done and be convined and persuaded that He is more than able to do what He has promised. Jesus is Lord.