For most men are in a strange uncertainty about it, whether it is of the devil or of God, and have somewhat hastily concluded that it is the chief end of man here to "glorify God and enjoy him forever".
Henry David Thoreau explaining how he set out to know the meaning of life by stripping it to its barest essentials
It occurs to me that simple answer from the Westminster Shorter Catechism, must have been taught to every young boy and girl in New England at the time. I started my teenage journey to find the answer to the same question by reading Walden over and over again. I then went to college and majored in biology because it was the scientific study of life and must, I thought, have some insight into what it all meant. I discovered, by the end of my four years, that biology's simple answer was that it was a giant mechanistic process driven by mutation and natural selection, that had no purpose and no meaning. Somehow that left too much unaddressed, or dismissed too much too easily. By the time I was in my mid twenties, I had given up. I concluded that there was no way to know and that life was just a long road down which we carried heavy burdens. It was at that point that, through various anguishing experiences and revelations, not to be enumerated here, the Spirit of God began to reveal himself to me. I began to believe there was something beyond the material world, but I knew nothing about it and went in search of answers in religion. I went to the library which was, at the time, across the street from my house and read every book there on every religion I could find books on. None of them quite matched the Spirit of revelation I was experiencing, until I picked up the Bible and began to read the four gospels. I came to realize that the Spirit I felt directing me and the one named Jesus speaking in the gospels were one and the same.So, from there, I became and remain a Christian. And I do believe that the chief end of man is to glorify God and enjoy him forever.
Enjoying him forever implies eternal life, and glorifying God means living your life by faith in what is righteous and living without fear because you believe there is a God who cares for you. To live a life as if you are in the presence of an all powerful and perfect God glorifies him not just to other people but to a myriad of beings we know nothing about.