Is God omnisapient?

from the old testament

• God knows everything in creation, and nothing is hidden from Him. Psalm 139:1—4 says, “O LORD, you have searched me and known me… Even before a word is on my tongue, behold, O LORD, you know it altogether.” 
  
• God’s knowledge is not learned or limited—He understands all things perfectly: “Great is our Lord, and abundant in power; his understanding is beyond measure" (Psalm 147:5).
  
• God knows the future before it happens. Isaiah 46:9—10 states:
  "'I am God, and there is no other;
      I am God, and there is none like me,
  10 declaring the end from the beginning
      and from ancient times things not yet done,
  saying, ‘My counsel shall stand,
      and I will accomplish all my purpose,’"
  
• God knows even the human heart completely as 1 Samuel 16:7 says, “For the LORD sees not as man sees: man looks on the outward appearance, but the LORD looks on the heart.”
  

from the new testament

• Hebrews 4:13 tells us that God sees and knows everything, even what is hidden.
  
• Jesus, who is God, shows divine knowledge, knowing people’s thoughts and hearts (Matthew 9:4).
  
• God’s wisdom and knowledge are complete and beyond human comprehension. Romans 11:33 reads, "Oh, the depth of the riches and wisdom and knowledge of God! How unsearchable are his judgments and how inscrutable his ways!"
• God’s knowledge includes every detail of our lives: “your Father knows what you need before you ask him” (Matthew 6:8).

implications for today

If God is omnisapient (and Scripture describes Him as such)—fully aware of everything, even the thoughts and motives a person never says out loud—that changes how they live, even when no one else is watching. It means there is no “hidden life” or private corner of existence that is actually hidden from Him, which removes the illusion that sin can be safely compartmentalized or that hypocrisy can be maintained without consequence. That truth can feel unsettling at first, but it also becomes deeply stabilizing: the same God who sees every failure also sees every struggle, every attempt at obedience, and every moment of faith that nobody else notices. And He is right there with us. He convicts us, provides the way out, and provides forgiveness.

God’s full knowledge also means He is never surprised by circumstances, never overwhelmed by complexity, and never misreads a situation. We can go to Him even when we don't understand or see the whole picture because He knows our thoughts before we even do!

As people, we often feel misunderstood, but the truth of God's omniscience should bring comfort rather than pressure. It means He never misjudges motives or reduces a person to their worst moment or most visible failure. Living with that awareness doesn’t make life more restrictive so much as more honest: it calls us to live faithfully for Him, the One who sees everything clearly and still invites us to walk with Him.