A Christian’s purpose of living is canonized in the 1st Westminster’s Shorter Catechism as:
Well, rationally and empirically, that is true to everybody’s life. Isn’t it true that most heroic tales really hit the edge when they sacrifice their own welfare for the betterment of others; especially when they sacrifice their own life? That is true in miniscule proportion as well, like when you’re doing small favor for others, you get some sort of untold pleasure while even in reality some resource of your life is spent (Time, Money, etc) not on yourself. So philosophically, it seems to explain why the happiest ones aren’t those who’re materially sufficient but usually those whose life purpose is more about doing or giving something to others.
As a Christian however, I remember a verse:
(John 15:13 [KJV])
Greater love hath no man than this, that a man lay down his life for his friends.
It inspires me to the fact that when you’re doing something else for others, you lose something and getting that “Joy” while still in this earth. But Christ, on the other hand let go of his own life in this earth for you and me in which after it he went to the place where the source of “Joy” is, the Kingdom of Heaven!
(Luke 17:33 [KJV])
Whosoever shall seek to save his life shall lose it; and whosoever shall lose his life shall preserve it.
Now I get some bits about life as a Christian. We are called to examplify life of Christ up to a point where we must literally or metaphorically give our life for the sake of others. Of course we can sacrifice our life for anything, but the LORD will show us perfectly to what or to whom we should devote our life’s sacrifice. The process of doing so will sanctify us day by day that when the fullness of time comes, our life has already become an unblemished offering to God.
Perhaps, a paragon to this illustration is Paul’s ministry to the Gentiles, summed up in these two powerful verses:
(Phil 2:17 [KJV])
Yea, and if I be offered upon the sacrifice and service of your faith, I joy, and rejoice with you all.
(1Thess 2:20 [KJV])
For ye are our glory and joy.
N.B: The Quotes are taken from Westminster Short Catechism