signs

37. From where do the sacramental signs come?
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Some come from created things (light, water, fire, bread, wine, oil); others come from social life (washing, anointing, breaking of bread). Still others come from the history of salvation in the Old Covenant (the Passover rites, the sacrifices, the laying on of hands, the consecrations). These signs, some of which are normative and unchangeable, were taken up by Christ and are made the bearers of his saving and sanctifying action.