Unanswered Prayer

Psalms 66:18 - If I regard iniquity in my heart, the Lord will not hear me:
Isaiah 59:2 - But your iniquities have separated between you and your God, and your sins have hid his face from you, that he will not hear.
Matthew 7:7 - Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you:
Matthew 21:22 - And all things, whatsoever ye shall ask in prayer, believing, ye shall receive.
Mark 9:23 - Jesus said unto him, If thou canst believe, all things are possible to him that believeth.
Mark 11:24 - Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them.
John 15:7 - If ye abide in me, and my words abide in you, ye shall ask what ye will, and it shall be done unto you.
Romans 8:26 - Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered.
Philippians 4:6 - Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.
Hebrews 11:1 - Now faith is the substance of things hoped for, the evidence of things not seen.