My observation is that some brilliant Christian minds can also be unkind, derisive and curt. They often write brilliant books with helpful analogies. They are very good at seeing what needs to change and what is wrong. I would not want to doubt their intelligence and giftedness.
However in personal contact including both in life experience, with emails and social media platforms they can easily find ways to cut down those with whom they disagree with, or take issue with. Often when a challenge comes to them or a point they make, they seem to take that quite personally. Their response may be curt. They may seek to bring others in to the discussion to prove why the person is wrong. They may also refuse to engage properly with the discussion.
One test for us to be able to examine our own hearts is to honestly say who we see ourselves as being in the biblical narrative.
Often someone with narcissistic tendencies will see themself as Jesus. The suffering servant. The leader of men. The one to whom others come and find wise and insightful teaching. They thank God that they can see things others cannot. When in your heart you believe you are Gods mouth piece, writing things others listen to, speaking out when others don’t, it can be intoxicating.
Jesus points this out when he describes one man in the temple beating his chest over his own sin. The Pharisee is out in front where everyone can see him, thanking God for how good it is. The posture of the weeper is humility, the posture of the Pharisee is self seeking and pride.
Can we truly see anyone be transformed? Of course. It can and it does happen. Perhaps for some it it a journey of deep and painful discovery. I have learnt to ask people what they actually see in me, and then listen.