God always right on time
And the Lord visited Sarah as He had said, and the Lord did unto Sarah as He had spoken. For Sarah conceived and bare Abraham a son in his old age, at the set time of which God had spoken to him. (Genesis Ch. 21 verses 1-2).
God did the impossible, He defied nature and biology. He intervened in the bodies of Abraham and Sarah and performed a miracle. When it comes to living by faith, you can trust both God’s word and God’s power. In His perfect timing and supreme sovereignty, God brought about what He had promised “at the set time.” He made it happen.
God’s timing may not always be perfectly convenient for us, and sometimes it does not make any sense, but it is always “at the set time.” God is always right on time because with Him there are no delays, and there are no surprises. When God is in control, and He is, events in our lives do not just happen by accident or chance.
Abraham was patient and believed God: He staggered not at the promise of God through unbelief, but was strong in faith, giving glory to God; and being fully persuaded that, what He had promised, He was able also to perform.
And therefore it was imputed to him for righteousness (Romans Ch. 4 verses 20-21). Faith is trusting God on His terms as well as His timetable, not our own.