As you come to him, the living Stone--rejected by men but chosen by God and precious to him. 1 Peter 2:4
Peter was fond of using the word "living" to describe the essential elements of the Christian faith. In 1 Peter 1:3, he uses the words "living hope" to describe the confidence we have in our future with God; a future that is fresh, vibrant, certain, and eternal as compared to the things of the world that are empty, deceptive, and temporal. In 1 Peter 1:23, he describes the Bible as the "living word" to show how Scripture, inspired by the living God, is as powerful, relevant, and life-changing today as the day it was first penned (or chiseled). Here Peter describes Jesus as the "living stone."
Jesus possesses life in and of Himself, and He alone gives true life to others. John wrote, "In [Jesus] was life, and that life was the light of men" (John 1:4). Although men rejected Him, Jesus was chosen by God "before the creation of the world" (1 Peter 1:20), to provide true life to all who believe on Him as their perfect Sin-bearer. Not only did He die for our sin, but rose back to life, conquering death itself.
In short: life, present and future, is found in Jesus Christ alone. It's that simple.
Father, thank You for Your Son, His work on the cross, and the life that He gives. May we be those who live abundantly through Him on the journey of life. In Jesus' name. Amen.