All my life, I've had trouble confronting people who push me around.
Assertiveness is the marriage of courtesy and insistence.
And learning to stand up for yourself is an art that takes practice. First, you need to know the difference between a grave injustice and a trivial slight. The Roman philosopher, Marcus Aurelius, didn't think so. Today I shall meet with a busybody, an ingrate, and a bully. But, he added, the reason these folks get our goat is that we let them.