“Washing” in the Bible represents purification - unsurprisingly! Washing dirt from the skin symbolizes using true ideas from the Lord to remove evil desires and false ideas from our minds. This is the reason that washing was such an integral part of ritual; cleaning the body to perform physical acts of worship - something with no actual spiritual value - is symbolic of repenting our evils and falsities as part of worshiping the Lord.

'Sanctuary' signifies the truth of heaven and the church. 'Sanctuary,' as in Ezekiel 24:21, signifies the Word.

(Референци: Apocalypse Explained 768; Arcana Coelestia 8330)