Sarah is said to have received power to conceive even when she was well past the age of childbearing because she trusted in God's faithfulness to His promise. But her faith didn't begin with trust. She reasoned that since she was old, God would fulfil His promise through Hagar. Years later, she scoffed at the idea that she would be able to conceive. But something changed in her heart and she simply trusted in God's faithfulness to His promise. What are the promises from God that we can cling to today?