@Therefore, I won't agree with your statement.
No life without Sun
However, if we are close and alert we can definitely find hints o some problem troubling the person. Not all are open easily. Sometimes it may need sincere and persistent persuasion to get the real reason from the person. If the person feels confident with us her she may confide in us about the problem. And then it should be or sincere effort to lessen or remedy the problem.
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease
In some cases people also sullen if we intensively asks them about their problems. A friend of mine who got some sickness but took dose of medicines without the physical activities as mentioned by the doctor. He do not have walking or physical exercises and so that he bulge himself as fatty posture. When I asked him to pursue walking and physical exercises he just get away from the place and gone to his room to avoid further talking in this connection. For such persons it is very difficult to help in any manner, though we willingly offer our help.
Human emotions are laced with mysterious undercurrents. Very few people can go in their depths.
It is also true that close friends sometimes can see the storm seated deeply in the minds of their buddies.
Knowledge is power.