The document discusses the keys of prayer, faith, and obedience in hearing God's voice. It states that through regular prayer and developing a personal relationship with God, one can hear His voice in thoughts of encouragement. Having faith in God without proof is also important. Obedience to God by following His commands makes it easier to believe and trust Him. The document provides five ways to practice hearing God's voice: setting aside daily quiet time, being still, not demanding answers from God, expecting to hear from Him, and being aware of messages from angels.