Speak & See
Romans 4:17 ESV
as it is written, "I have made you the father of many nations" - in the presence of the GOD in whom he believed, who gives life to the dead and calls into existence the things that do not exist.
Get a vision of what the LORD has promised you. See it in your mind's eye (by faith). Then speak it as though it has already happened.
I was listening to a pastor who told of how his team had a planning meeting for a major event. As they discussed the dates one of the ladies on his staff said, " I'm sorry, but I'll be out on maternity leave. My baby is due." After the meeting, the pastor asked his family members "Why didn't anyone tell me she was pregnant?" They responded, "She's not. she's speaking it by faith!" Today, she is a mom.
Words create. So get a clear vision of your promise and begin to speak it (call) into existence.