What scriptures support the basis about God being Omniscient?
The word “omniscience” means “the state of being omniscient.” (Webster’s Seventh New Collegiate Dictionary). The word “omni” means “all.” The word “science” means “knowledge.”
Please note that much of what is called “science” today is not science. Real science is true knowledge, but much of what passes for science in the schoolrooms today is just “theory,” meaning, “just a guess.” The Bible warns us about such false science coming along, like evolution. I Timothy 6:20,21 says, “O Timothy, keep that which is committed to thy trust, avoiding profane and vain babblings, and OPPOSITIONS OF SCIENCE FALSELY SO CALLED: Which some professing have erred concerning the faith. Grace be with thee. Amen.”)
When you put the two words of omniscience, omni, and science, together, they mean “all-knowing.” In other words, God knows everything. He knows everything that has happened, is happening, and will happen. There is nothing that God does not know.
Revelation 1:8 says, “I am Alpha and Omega, the beginning and the ending, saith the Lord, which is, and which was, and which is to come, the Almighty.”
Proverbs 15:3 says, “The eyes of the LORD are IN EVERY PLACE, beholding the evil and the good.”
Psalm 147:5 says, “Great is our Lord, and of great power: HIS UNDERSTANDING IS INFINITE.”
Psalm 139:1-12 says, “O LORD, thou hast searched me, and known me. Thou knowest my downsitting and mine uprising, thou understandest my thought afar off. Thou compassest my path and my lying down, and art acquainted with all my ways. For there is not a word in my tongue, but, lo, O LORD, thou knowest it altogether. Thou hast beset me behind and before, and laid thine hand upon me. Such knowledge is too wonderful for me; it is high, I cannot attain unto it. Whither shall I go from thy spirit? or whither shall I flee from thy presence? If I ascend up into heaven, thou art there: if I make my bed in hell, behold, thou art there. If I take the wings of the morning, and dwell in the uttermost parts of the sea; Even there shall thy hand lead me, and thy right hand shall hold me. If I say, Surely the darkness shall cover me; even the night shall be light about me. Yea, the darkness hideth not from thee; but the night shineth as the day: the darkness and the light are both alike to thee.”
Ezekiel 11:5 says, “I know the things that come into your mind, EVERY ONE OF THEM.”
It is very clear that God knows everything. He is omniscient (all-knowing). He is omnipresent (everywhere at once). And He is omnipotent (all-powerful).
To the unsaved person, that is a scary thought, that God knows everything that he/she has done. Revelation 20:11-15 says, “And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them. And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works. And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works. And death and hell were cast into the lake of fire. This is the second death. And whosoever was not found written in the book of life was cast into the lake of fire.”
To the saved person that is not right with God, that is also a scary thought, that God knows exactly what they have been doing. I COrinthians 3:11-15 says, “For other foundation can no man lay than that is laid, which is Jesus Christ. Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble; Every man’s work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man’s work of what sort it is. If any man’s work abide which he hath built thereupon, he shall receive a reward. If any man’s work shall be burned, he shall suffer loss: but he himself shall be saved; yet so as by fire.”
To the Christian who is living faithfully for the Lord, it is a comfort that God does know everything. People may accuse us of wrong actions, wrong motives, or wrong thoughts — but God knows the truth. One day, praise the Lord, we are going to stand before the One who really knows what we have thought, what we have done, and what we have felt.