It’s an interesting question, as there are always different symbols or things that relate to different people groups. Our church has developed a foot washing culture as an evangelical event. A small group of our people participate in the local churches Easter festival or in some cases setup at spiritual exploration festivals. This is done as a blessing to people and is often the most popular, this is to me a symbol to those giving that they desire to show the love of God in a simple practical way. Those receiving know that they have enjoyed a foot wash or they realize that a stranger is washing their feet and showing them the love of God in a simple practical way.
The things where we people can join in easily is the types of worship that has survived within the main stream of worship within the churches over the years. Singing, Baptism, Eucharist are simple things that groups of people on any level can participate in together. Foot washing, candle lighting and other types of symbolic worship are perfectly valid but I observer these are often done in smaller groups that people feel are appropriate settings. This is not to say that there are any rules to this.
The seasons of the year seem to be a key that provokes the expressions of symbolism. People in the Philippines have large symbolism over the gathering of Palm leaves to the home almost to a superstitious point. The Crucifixion is also re-enacted every year promoted by the season. In my church context ,we take these symbols, and attempt to include them just enough, in order that we enhance the meaning of the season without taking the focus away from whom we are celebrating.
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