God knows every thought that you have ever had and everything that you have ever done.

God is Love, and the world has rebelled against Love. God is holy and can't even look on that which is not Love, so all of humanity has been separated from God by lack of Love.

The lack of love is also known as sin.

This sin is rebellion against God, which results in missing the mark.  Sin is failing to attain to the glory of God. It is a desire to NOT commune with God.  It is a desire to NOT glorify and respect God and NOT hold Him in holy reverence. It is a desire to add to and take away from God's Word and to follow one's own mind and will, which leads to spiritual death and is the cause of physical misery, sickness, and death.

Almost all, or perhaps all, of what is called love or good by those who are in rebellion against God is actually the exact opposite of Love.

There's a price to pay for this rebellion both in this age and in the one to come. That's why we see sickness, disease, turmoil, sorrow, and death. That's why there is a hell. God also knows that we all know that there is a hell, and He knows that scoffers are merely trying to make themselves feel less dread.
Romans 13:9
Isaiah 5:20