You and I are, by birth, by nature, and by choice, inwardly depraved, which is to say that we are entirely corrupt. That's not to say that we have no good in us; we do. However, anything good in us has been tainted with evil. It touches everything. Without the redeeming power of Christ we cannot halt our own moral slide.
Too much self-centered attitude, you see, brings, you see, isolation. Result: loneliness, fear, anger. The extreme self-centered attitude is the source of suffering.
It is very important to generate a good attitude, a good heart, as much as possible. From this, happiness in both the short term and the long term for both yourself and others will come.
When we meet real tragedy in life, we can react in two ways - either by losing hope and falling into self-destructive habits, or by using the challenge to find our inner strength. Thanks to the teachings of Buddha, I have been able to take this second way.