Dirar bin Murrah (rahimahUllah) said:

Dirar bin Murrah (rahimahUllah) said:
“Iblees said, ‘If I win three things from the son of Adam, I will have earned what I wanted from him:
1 - If he forgets his sins,
2 - thought high of his actions,
3 - and became fond of his opinion.’”
[Sifatus Sawfan, vol.3, p.116]

DIFFERENCE Between SHOWING-OFF And SELF-ADMIRATION!

Ibn Taymiyyah (rahimahUllah) said when differentiating between self-admiration and show-off:
“Self-admiration is akin to showing off, but showing off is a kind of including people as a motive for one’s efforts, whereas self-admiration is including oneself with Allah (in the sense that one remembers one’s talent but forgets that they all come from Allah and by His help).

So the show-off is not fulfilling the words, “You (alone) we worship“, [1:5] and the one who admires himself is not fulfilling the words, “and You (alone) we ask for help,” [1:5] because the one who fulfills the words “You (lone) we worship” will avoid showing off, and the one who fulfills the words “and You (alone) we ask for help” will avoid self-admiration.”
[Majmoo’ Al-Fatawaa, 10/277]