vatican.va/holy_father/john_paul_ii/homilies/documents/hf_jp-ii_hom_20000312_pardon_en.html
Little excerpt:
"
Let us forgive and ask forgiveness! While we praise God who, in his merciful love, has produced in the Church a wonderful harvest of holiness, missionary zeal, total dedication to Christ and neighbour, we cannot fail to recognize* the infidelities to the Gospel committed by some of our brethren*, especially during the second millennium. Let us ask pardon for the divisions which have occurred among Christians, for the violence some have used in the service of the truth and for the distrustful and hostile attitudes sometimes taken towards the followers of other religions.
Let us confess, even more,
our responsibilities as Christians for the evils of today. We must ask ourselves what our responsibilities are regarding atheism, religious indifference, secularism, ethical relativism, the violations of the right to life, disregard for the poor in many countries.
We humbly ask forgiveness for the part which each of us has had in these evils by our own actions, thus helping to disfigure the face of the Church."
–Bl. Pope John Paul II