Observe

In plain English, to observe means to see attentively — to give careful, focused attention to something. This is precisely what the Hebrew shamar points at: watchful, protective attention toward something valued. In religious usage, particularly in the Church of God tradition, “observe” has been reduced to performing an external requirement. The original sense — attentive seeing that allows something to reveal itself — is what the feasts and sabbath are actually asking for.

Synonyms: shamar, keep, watch, guard.