“The eyes of the LORD are in every place, keeping watch on the evil and the good” (Proverbs 15:3).
Do you remember when Jeremiah asked the question about who can know the heart because it is deceitful? This question communicates that no man can understand it, but Jeremiah would go on to say it is God who searches and knows it (Jeremiah 17:9-10). Nothing gets by God.
God in omniscient – He knows all and sees all. As Charles Spurgeon wrote,
“God knows all things naturally and as a matter of course, and not by any effort on his part. Searching ordinarily implies a message of ignorance which is removed by observation; of course this is not the case with the Lord; but the meaning of the Psalmist is, that the Lord knows us thoroughly as if he had examined us minutely, and had pried into the most secret corners of our being.” (The Treasury of David, pg. 258)
There is nothing outside of God’s knowledge. A.W. Pink wrote in his book Gleanings in the Godhead,
“God knows everything; everything possible, everything actual; all events, all creatures, of the past, the present, and the future. He is perfectly acquainted with every detail in the life of every being in heaven, in earth, and in hell. … Nothing escapes his notice, nothing can be hidden from him, nothing is forgotten by him. … He never errs, never changes, never overlooks anything.” (pg. 19)
God never discovers anything. He is never surprised or never amazed. He never wonders about anything nor does He seek information or ask questions. He has never learned and will never have to learn. He knows all things past, present and future, all things actual and possible.
In the western Pacific Ocean sits the Mariana Trench, which is the deepest part of the oceans on the planet. It is deepest at 6.8 miles down (or almost 36,000 feet) in a place called Challenger Deep. It is a place where no sunlight can penetrate (Psalm 139:1-3).
Every word we even consider using God knows. Every word in our vocabulary He knows. Even before our brains began working and coming up with something to say, God knew everything we would consider uttering. Every feeling or idea or resolve or goal or doubt or perplexity is known by Him.
God knows us better than ourselves.
You think He is aware of good and evil in the world? You think He will let evil get away with evil (Exodus 34:7b)? You think He won’t reward those who honor and glorify Him (Revelation 22:12).