They are darkened in their understanding and separated from the life of God because of the ignorance that is in them due to the hardening of their hearts.
NIV
Their moral understanding is darkened and their reasoning is beclouded. [They are] alienated (estranged, self-banished) from the life of God [with no share in it; this is] because of the ignorance (the want of knowledge and perception, the willful blindness) that is deep-seated in them, due to their hardness of heart [to the insensitiveness of their moral nature].
AMP
Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart:
KJV
Again Jesus said, "Simon son of John, do you love me?" He answered, "Yes, Lord, you know that I love you." Jesus said, "Take care of my sheep."
NIV
Again He said to him the second time, Simon, son of John, do you love Me [with reasoning, intentional, spiritual devotion, as one loves the Father]? He said to Him, Yes, Lord, You know that I love You [that I have a deep, instinctive, personal affection for You, as for a close friend]. He said to him, Shepherd (tend) My sheep.
AMP
He saith to him again the second time, Simon, son of Jonas, lovest thou me? He saith unto him, Yea, Lord; thou knowest that I love thee. He saith unto him, Feed my sheep.
KJV