Here’s some excerpts from Shown to Be Holy (I’ll explain why in a bit):
"In this mystery [Holy Baptism - M], by God’s design and the power of the Holy Spirit, we are grafted onto Christ… Because of this union we are carried along with Christ, as it were, in His relationship with the Father. We die to sin with Adam and are raised again with Him (the very rites of baptism are meant to represent this). We receive the anointing with the Holy Spirit which He received and have that Spirit dwelling in us as it dwells in Him. His physical body and blood are mystically joined to ours in the Eucharist so that our entire nature may enter upon a journey of transfiguration: one which will only be completed in eternity… (Emphasis added)
Our likeness to the Holy One through baptism now makes us holy. And like the many “holy things” employed in the Church, such as holy water, oils, vessels, icons or vestments, we have been set aside to serve a new purpose. As the entire human race was intended to be, we have been set apart to reflect the Holy One in creation.
The way we use the holy things mentioned above reflects their special purpose. We do not use the chalice for ordinary drinks or the holy table for a buffet. In the same way our human nature, once made holy in baptism, is to be used only in an appropriate way… “You must know that your body is a temple of the Holy Spirit, who is within you: the Spirit you have received from God. You are not your own. You have been purchased, and at a price. So glorify God in your body” (1 Cor. 6:19-20). That which is holy must be used for righteousness’ sake."
Source: Shown to Be Holy. 1990, McKees Rocks: God With Us Publications, p. 9, 11-12.
Because my body is consecrated to God, I have to use it properly. The same applies to the deceased. Their bodies must be treated with reverence.
My mom passed away shortly before Thanksgiving. I picked her nice blue dress to bury her in. We had a closed casket viewing (out of consideration for my nephew who’s very young) and an open casket funeral. Father solemnly sealed “this casket until the second coming of Christ + in the Name of the Father, +and of the Son, +and of the Holy Spirit. Amen.”
For me, it was easier to say goodbye to my mom with an open casket. I got to see her one last time. I don’t think I would have felt the same way if she had been cremated.