Excellence is not an act, rather a habit.
I cannot believe that the purpose of life is to be happy. I think the purpose of life is to be useful, to be responsible, to be compassionate. It is, above all to matter, to count, to stand for something, to have made some difference that you lived at all.
"People are often unreasonable, illogical, and self-centered; Forgive them anyway. If you are kind, people may accuse you of selfish, ulterior motives; Be kind anyway. If you are successful you will win some false friends and true enemies; Succeed anyway. If you are honest and frank, people may cheat you; Be honest and frank anyway. What you spend years building, someone could destroy overnight; Build anyway. If you find serenity and happiness, they may be jealous; Be happy anyway. The good you do today, people will often forget tomorrow; Do good anyway. Give the world the best you have, and it may never be enough; Give the world the best you've got anyway You see, in the final analysis, it is between you and God; It was never between you and them anyway." - Mother Theresa
Why do you worry? Who are you afraid of? Whatever has happened has happened for the good. What is happening is also happening for the good. Whatever will happen, will be for good also. Do not repent over the past, or worry for the future. Do your duty selflessly---and to the best of your abilities---in the present only.
What have you lost for which you cry? You did not bring anything to this world when you were born. You are unnecessarily attached to your possessions. This attachment is the root cause of all your sufferings. Treat all your possessions as a trust property given to you by the God. Let the thoughts of 'I' and 'my' be completely wiped of your mind. Practice detached attachment. Always remember the creator, and surrender to the will of the Lord.
Why worry about the unavoidable death? Change is the law of nature. Atmaa (Spirit) is the abode of body, and the body is an abode for the individual soul (Jeev). This physical body was not here in the past, nor will it remain here for ever. But, the Atmaa is immortal. It neither takes birth nor dies. Atmaa only changes its bodies as you change your garments.