Sometimes people who adamantly assert an opinion or view don't even hold it themselves.

Never ask advice from someone who has something at stake or something to lose from your decision. The more objective the person is the greater value you should place on the input.

At the root of fear is low self-esteem. This explains why angry people have low self-esteem, are argumentative, stubborn, and quick to flare up yet slow to forgive. Those behaviors are defenses against the underlying fear.

Jealousy of other people's success is a sure sign that you feel unfulfilled in your own life. Seeing them enjoy the fruits of their labors is a painful reminder that you do not have what you want nor have you been actively seeking it.

The guilty are uncomfortable with silence.

Consider, for example, lust versus love. When we lust after someone or something, we think in terms of what they (or it) can do for us. When we love, however, our thoughts are immersed in what we can give to someone else. Giving makes us feel good, so we do it happily. But when we lust, we only want to take. When someone we love is in pain, we feel pain. When someone whom we lust is in pain, we only think in terms of what that loss or inconvenience means to us.

Sometimes people who adamantly assert an opinion or view don't even hold it themselves.