There are, broadly speaking, two approaches to life: where reality is external and consists of timeless principles, standards and facts, or where reality is substantially internal and consists of preferences and passions.
A person whose reality is external seeks to bring his thinking and behavior into harmony with outside considerations. If an outside fact contradicts one of the things he desires, he rejects that desire. If an outside law tells him that coveting and theft are wrong, he rejects thoughts that lead him to covet or attempt to steal.
A person whose reality is internal only accepts events and facts from the outside that are in harmony with the world as he prefers it in his own mind. Indeed, his internal reality is malleable, almost plastic, and continually morphs and changes so that what was true and correct changes from one moment to the next. This reality must be maintained and protected. This reality is his very idea of himself.
Since such as person is human, while he devises and maintains his own morality, he also continually fails to adhere it it. So, he must continually excuse his failures and faults. He does so by making exceptions and even changes to the rules themselves. Such people reject the concept of sin because in their own minds they cannot sin, because every failing is excusable. Yet, giving themselves a pass causes deep dissatisfaction with their own human nature, and this is why these people project anger. They are often heard complaining that conservatives are “angry” when in fact they are just projecting their own anger with themselves.
People with internal realities are never constrained by any principles. If they don’t reject the principle, they will excuse why the principle doesn’t apply in the case at hand. Having rejected principles, they must respect power. Indeed, they become power-oriented. Only power restrains them externally, for nothing restrains their internal reality.
This explains the two main world views that we see struggling to control our lives today. This explains why we can see politicians who claim one thing in the morning and contradict themselves in the afternoon with equal sincerity. This explains why a politician can claim to be for something before he was against it. And it explains why they thing they can print and borrow their way to full employment and prosperity for all.