But as all the little details--the Seder plate, the salt water, the extra place setting for Jesus, the candles--were coming together, I remembered why I feel this is important.
The ritual washing of hands reminds us how the Priests washed in a basin before they could come into God's presence (Ex. 30:17-21). We believe this practice points to Jesus, who washes away our sins so that we can draw near to God. (Heb. 10:22)
Dipping of the parsley: the first dip refers to the tears shed by the Israelites while they were slaves in Egypt. The second dip refers to the drowning of the Egyptian army in the Red Sea and the miraculous deliverance God provided for Israel. In 1 Cor. 10:1-2, Paul compares the crossing of the Red Sea to baptism, which symbolizes redemption from sin.
That is why my family will do "this" in remembrance of Him.