'Deep' in the Bible

In the same way, the Spirit also helps us in our weakness, since we do not know how to pray as we should. But the Spirit himself intercedes for us with groans too deep for words,

I have deep sorrow and unceasing anguish in my heart,

As it is written, "To this day God has put them into deep sleep. Their eyes do not see, and their ears do not hear."

O how deep are God's riches, and wisdom, and knowledge! How unfathomable are his decisions and unexplainable are his ways!