In the crossing of the Red Sea, the water symbolised life and death together; death of the servile man and life of the free man who came up out of the water.
On Maundy Thursday, the water symbolised purification. That is why, after washing the feet of His Apostles, the Lord said: "...and you are clean" (John.13: 10). The Psalmist says:
"I will wash my hands in innocence" (Ps.26: 6). This cleansing is the washing of the new birth with the word; the cleansing which we receive in the bath of the new birth and the cleansing obtained in baptism referred to by the Apostle's words: "...and our bodies washed with pure water" (Heb.10: 22).