We don't need to explain why so many thinkers pass on essentially the same message: that life is suffering, or at least that suffering is one of the fundamental components of life. Practically everyone who has reached adulthood has either been through hell or been close to someone who has.

And it's ok not to be able to bear the tragedy of life at times, because it can truly be tragic, and there are a lot of factors other than sheer willpower that define your capacity of dealing with it, such as how or in what conditions you were raised.

Some people are naturally more inclined towards assertiveness, as psychometric studies point out, and that can make it easier to deal with life's problems, be them situations or people.

However, those on the more agreeable end of the spectrum might have difficulty finding strength in their goodwill and wish to help others. The problem is, lack of strength descreases the probability that you'll be able to do so.