It's more in the vein of advice you get on the plane - when oxygen masks drop you need to put the mask first before putting another over the face of someone you care for.
In that analogy, compassion and love are the oxygen. If you hold on to anger and defensiveness in order to "fend for yourself" it's like failing to put on your oxygen mask because you hold on to your valuables, thinking someone is going to steal them in the middle of a plane crash.
Well you could've stated it that way from the get go. As it stands your comment reads like a strong denial of helping others in favor of helping yourself.