(Rom 12:4) For as we have many members in one body, and all members have not the same office: (5) So we, being many, are one body in Christ, and every one members one of another.” The body has functions of which we may know nothing about yet is vital to our functioning at full peak. So is the functioning of the church. We as a spiritual part of the body may think our not being there harms nothing. We are wrong. Our absence is harming other believers.