Why do Latter-day Saints get baptized for their deceased ancestors?

We believe that when people die, their spirits live on and they have the freedom to accept or reject temple ordinances performed on their behalf. They are not forced to accept these ordinances, nor are they listed as members on Church records. Rather, performing ordinances on their behalf is an act of service, freely given by Church members out of love and sincere concern for the eternal welfare of all God’s children. It is evidence of our certainty that God loves all His children and that, because of the Atonement and Resurrection of Jesus Christ, death is not the end of our eternal progression.

How do you feel knowing our Father in Heaven is so merciful He provided a way for all of His children to return home?