Biblical explanation
David repeatedly expresses confidence that God hears prayer. Psalm 65:2 says: "O thou that hearest prayer, unto thee shall all flesh come." Jesus instructed His followers to pray to the Father (Matthew 6:6-13). Scripture also teaches that God knows what we need before we ask: "Your Father knoweth what things ye have need of, before ye ask him." Matthew 6:8, KJV The Bible does not make Satan's ability to hear private prayers a central concern. Instead, its emphasis is on directing our prayers to God and trusting Him. The Bible does not explicitly teach that Satan can hear every private prayer. It also does not teach that Christians need to use special secret wording to prevent Satan from hearing them. Prayer is communication with God. The believer's confidence is based on God's knowledge, love, and power.
Key takeaway
The great controversy reveals God's character as Christ ministers as our High Priest in the heavenly sanctuary. The dead await the resurrection, Christ's return will be visible and personal, and prophecy calls believers to faithful mission rather than date-setting or fear.