1 Peter 2:4

4 And coming to Him as to a living stone which has been rejected by men, but is choice and precious in the sight of God,

Peter encourages his readers to come to Him and abide in Him (Jn. 15:5) as our living foundation stone (1 Cor. 3:10-11), upon which we can be built up on. He has been rejected by men, but for you He will be precious as he is in His Fathers eyes.