Complex sentence: These are believed to symbolize sin during this time period, and eat unleavened bread, which is believed to be a spiritual picture of living a Christlike life by partaking of the "true Bread of life" and avoiding sin.
Split into simpler sentences: These are believed to symbolize sin during this time period. Members also eat unleavened bread, which is believed to be a spiritual picture of living a Christlike life by partaking of the "true Bread of life" and avoiding sin.