As well as Peter's three denials, we have three wonderful statements which point us away from Peter, in his failure, to Christ, who is the Rock of our salvation.
(a) "You are the Christ, the Son of the living God" (Matthew 16:16).
(b) "This Jesus, God has raised up and "made both Lord and Christ" (Acts 2:32, 36).
(c) "Jesus Christ is the chief cornerstone. To you who believe, He is precious" (1 Peter 2:4-7).
Praise God - Our faith is not built on shifting sand. It is built on Jesus Christ, the Son of God, the risen Lord, the wonderful Saviour.