Every person, no matter what their role in life, needs to be aware of the temptation that power offers us. David was led astray, not by Bathsheba bathing on the roof-top, but by his desire to be a "real" king. Many Kings act like dictators. They expect to have any woman they want. Men in lesser possitions often do the same thing. Power corrupts.

When we face difficulties, we need to double down on our commitment to do our duty. The giants we face may be insurmountable. David tells Saul that when he goes out to keep the sheep by night, he prepares himself to do his duty, for he doesn’t know if he will face a lion or a bear. He has decided beforehand to be courageous.