Contradiction with James 4:3
Highlights that prayers made with wrong motives are not granted, whereas 1 John 5:14 emphasizes asking according to God's will.
James 4:3: Ye ask, and receive not, because ye ask amiss, that ye may consume [it] upon your lusts. [lusts: or, pleasures]
Contradiction with Matthew 7:7-8
Promises that everyone who asks receives, which seems unconditional compared to 1 John 5:14's prerequisite of asking according to God's will.
Matthew 7:7-8: Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you:
Contradiction with Isaiah 59:2
Indicates that sin can hinder prayers from being heard, which contrasts with 1 John 5:14's assertion about confidence in prayer.
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. [have hid: or, have made him hide]
Contradiction with 2 Corinthians 12:8-9
Shows Paul's unanswered prayer despite his faith, contradicting 1 John 5:14's assurance of hearing prayers.
2 Corinthians 12:8-9: For this thing I besought the Lord thrice, that it might depart from me.
Contradiction with Mark 11:24
Stipulates belief as the only condition for receiving what is prayed for, differing from 1 John 5:14's condition of aligning with God's will.
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].