Ephesians 4:3-6; One baptism, part 6. Ceremonial vs. true cleansing.
All of us must come to know, love, and appreciate how clean clean needs to be to be in the presence of God as holy, and to then adore our Lord for making us just that clean through His own sacrifice.
Still, it is important and insightful to study the cleansing ritual of the past. Like so many things in the OT, it will help us form an accurate picture in our minds concerning baptism.
Baptism meaning: immersion, identification, abiding...
for full notes: https://www.cgtruth.org/index.php?proc=msg&sf=vw&tid=2432