But you are a chosen race, a royal priesthood, a holy nation, a people for God's own possession, so that you may proclaim the excellencies of Him who has called you out of darkness into His marvellous light; for you once were not a people, but now you are the people of God; you had not received mercy, but now you have received mercy.
The significance of your life is found in your relationship with God!
Without God we're no more than complex animals, serving our instincts for pleasure and self-preservation, caring for our young until they can independently pursue their own pleasures and self-preservation. Such a life holds no meaning, it's mere existence.
But when God touches our lives, we become part of His family and His great purpose. Our essential nature changes—we become spiritually alive, His Spirit begins to guide us. This is far more than existence; it's transcendence! We have a meaningful relationship with the God of the universe, not because we deserved it, but because He reached out to us in love and revealed Himself to us. We can know Him!
As J.I. Packer puts it: "What were we made for? To know God. What aim should we have in life? To know God. What is the eternal life that Jesus gives? To know God. What is the best thing in life? To know God. What in humans gives God most pleasure? Knowledge of Himself."