In Luke 2:14, angels announce the arrival of the Christ to shepherds in a field. They sing “Glory to God in the highest, and on earth peace among those with whom he is pleased!”
The question then is with whom is God pleased? In Luke 3, when Jesus is being baptized, the Spirit descends on Him, and the Father says “You are my beloved Son; with you I am well pleased.”
Jesus, is the only human who, on his own merit, pleases the Father. By faith, we are hidden in Christ and thus the Father is also pleased with us.