How do we know God's promises about prayer are true?

The truth of God's promises regarding prayer is affirmed in multiple Scriptural passages. For instance, John 15:16 states, 'Ye have not chosen me, but I have chosen you, and ordained you, that ye should go and bring forth fruit, that your fruit should remain; that whatsoever ye shall ask of the Father in my name, He may give it you.' This promise underscores the faithfulness of God in responding to our prayers when we ask in accordance with His will and in faith. The consistency of God's character throughout Scripture reassures believers of His commitment to fulfill His promises.