Being confident of this very thing, that he which hath begun a good work in you will perform it until the day of Jesus Christ: (Philippians 1:6). Therere those who sometimes think the Lord is a bit slow in delivering on His promises, and then try to help or fix things for Him their own way; thats wrong!
The trouble isnt with God, but with men when they havent mixed the Word with faith. Take the story of Abraham and Sarah as a case in point. When Abraham was seventy-five years old and Sarah, sixty-five, God gave them the promise of an offspring (read Genesis 17:1-8).
Ten years later, they still hadnt seen any descendants. Then, Sarah, who at this time believed she had passed the age of childbearing, proposed that Abraham took Hagar, her Egyptian maid, to bear him a child: perhaps, Gods Word could come to pass through her. Abraham concurred to Sarahs suggestion. A child indeed came from this relationship Ishmael. However, this singular act brought untold frustrations to Sarah herself (read Genesis 16), and other incalculable problems to Isaac and his seed, and the conflict continues today between the seed of Isaac and the seed of Ishmael.
The Lord never fails or disappoints. He, however, expects us to mix His Word with faith at all times; thats what brings about the reality in the now of our lives. Hebrews 11:1 says Now faith is the substance of things hoped for, the evidence of things not seen. When God gives you His Word, He expects your absolute trust and confidence in Him to bring it to pass. His Word is dependable; it never fails. Jesus emphasized this in Mark 13:31 when He said, Heaven and earth shall pass away: but my words shall not pass away.
Trust in the Lord wholeheartedly, and rest your faith on His Word. Dont use human wisdom or ideas to try to work things out for Him; dont rationalize His Word. Be confident that Hell deliver as promised, for Hes not a man that He should lie. So let us seize and hold fast and retain without wavering the hope we cherish and confess and our acknowledgement of it, for He Who promised is reliable (sure) and faithful to His word (Hebrews 10:23 AMP).