It is said that getting a human birth is fortune. However, some people live very comfortable lives while others live miserably. Why this discrimination?

Sri Sri Ravi Shankar:

Those who are happy must share with those who are unhappy. Those who are unhappy must have an attitude of sacrifice and work on developing inner strength.

Knowledge gives you inner strength. Inner strength brings forbearance in life and gives one the capacity to have a good conduct with others. That is why Gyan (knowledge), Gaan (music) and Dhyan (meditation) are very important in life.