Book of Common Prayer (page 352)

If we say that we have no sin, we deceive ourselves, and the
truth is not in us. But if we confess our sins, God, who is
faithful and just, will forgive our sins and cleanse us from all
unrighteousness. 1 John 1:8,9

Since we have a great high priest who has pased through the
heavens, Jesus, the Son of God, let us with confidence draw
near to the throne of grace, that we may receive mercy and
find grace to help in time of need. Hebrews 4:14,16

The Deacon or Celebrant then says

Let us confess our sins against God and our neighbor.

Silence may be kept.

Minister and People

Most merciful God,we confess that we have sinned against you
in thought, word, and deed,
by what we have done,
and by what we have left undone.
We have not loved you with our whole heart;
we have not loved our neighbors as ourselves.
We are truly sorry and we humbly repent.
For the sake of your Son Jesus Christ,
have mercy on us and forgive us;
that we may delight in your will,
and walk in your ways,
to the glory of your Name. Amen.