It’s a blessing to not have explicit personal witness of God (apart from the Bible)
The angels knew God directly, so there was no room for forgiveness for those who rebelled
The people before the Bible was completed witnessed God, His prophets, and His miracles, so they also experienced God’s judgement explicitly
Fortunately, we have an entire lifetime of grace with which to desire and believe in God
"Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed are they that have not seen, and yet have believed."
John 20:29