Most religions have rituals of purification and expiation by which the relation of the individual to the divine is strengthened.
In Christianity, atonement is achieved through the death and resurrection of Jesus.
In Roman Catholicism, Eastern Orthodoxy, and some Protestant churches, penance is a sacrament that allows for personal atonement (see confession).
In Judaism the annual Day of Atonement, Yom Kippur, is the culmination of 10 days centered on repentance. - From MerriamWebster.com
How do you atone?
For what do you atone?
Who or what is the “God” with which you would like to be reconciled?