man's greatest enemy

WHILE I was waiting for my niece to get out from her tutorial class, I saw a man going to a room, an office, beside my niece's center. He was wearing black slacks and a perfectly ironed long sleeved polo. He was also clutching a leather pouch bag and holding an iphony, the usual office boss aura. He rang the bell on the door. No one had responded. He waited for another minute and then rang it again. His hands were already tense and his composure changed as if it was freezing. His arm muscles got tense, and then he latched on his pocket and picked out a chained set of keys. I thought he would have a difficult time unlocking the door, but he did it in a split second. Then, he slammed the door...

A TV add last week; There's a man leaving a building. When he's on his way going out through the door, a brat girl popped out in front of his face. The gal flipped her hair and lifted her chin, made a signal through her intimidating eyes that tell the man to back off from the door.

MY HIGH school friend, a laude of a pontifical university told me this, "I have superiority complex" that's why he has a thick-skinned interaction with his workmates who graduated in "low-class" school and made him believed that he's ten feet higher than the rest.

What's the commonality with these stories?

"Self-importance is man's greatest enemy. What weakens him is feeling offended by the deeds and misdeeds of his fellow men. Self-importance requires that one spend most of one's life offended by something or someone."--Don Juan