If I asked you what you wanted in life, you may reply 'happiness'
Then I would say, then be happy!
Your reply may be, how can I be happy when there are tsunamis in the world, my neighbours dog barks all night, the stock market is crashing... my ex wife is suing me...
What you are actually saying to me is that you are basing your happiness on all external events and people meeting your needs. While you continue to do this you will be destined to unhappiness.
Why, because you do not control anything outside of yourself.
Self knowledge is the enquiry into understanding the Self where you recognise that you carry your happiness within you which is never subject to loss.
Have a happy day,