Any fool can be mean, or pushy, or selfish, or any of the seven deadly sins, really.
What’s REALLY hard is keeping oneself in check.
Keeping one’s head, “while all around you are losing theirs” (Thanks, Rudyard!).
What they call “Self-awareness”.
But in order to be to be self-aware, first one needs a self to be aware of.
And that takes a while. Often an entire lifetime.
Better start soon…