Our physical health is of such tremendous importance to us that we constantly monitor certain health issues that come our way. We are wary of certain spots on our skin, growths that appear, pains in certain places, problems with our vision, etc., etc., etc. While we realize it or not, we are doing regular self-examinations to keep 
ourselves as healthy as possible.
How important is your spiritual health to you? As important as your physical health? How often do you do self-exams on your soul? The Great Physician prescribes, “Examine yourselves as to whether you are in the faith. Test yourselves” (2 Cor. 13:5). Are you living in a right relationship with Christ? Are you “in the faith”? Is “Jesus Christ in you” (end of verse 5)? Have the “old things” truly “passed away” (5:17)? Are you living as “a new creation” of Christ?
Self-examinations need to look at our conduct (1 Pet. 4:1-3), speech (Jas. 3:1-12), thoughts (Phil. 4:8), motives (Rom. 14:22-23), faith (Heb. 11:6), beliefs (Rev. 22:18-19), teachings (Gal. 1:11-12), love (1 John 4:7-5:3), eternal destiny (2 Thess. 1:7-9; Rom. 2:5-11), etc.