A chip on the shoulder is too heavy a piece of baggage to carry through life.

...you want things to remain the same, which they never can, and so you’re wounded by your own feelings & resentful others don’t seem to care...

He who requires much from himself and little from others, will keep himself from being the object of resentment.

Resentment is weak and lowers your self-esteem.

It is strange that we do not temper our resentment of criticism with a thought for our many faults which have escaped us.

Beware of the man who works hard to learn something, learns it, and finds himself no wiser than before. He is full of murderous resentment of people who are ignorant without having come by their ignorance the hard way.