Why do Anglicans stand, sit and kneel throughout worship?
Since we are not bodiless spirits but rather embodied spirits it is important to get the whole of our person involved in worship. The body impacts the spirit. In many Anglican churches we stand to praise and sing; we sit for instruction; and we kneel to pray. This is still followed in large measure except that now many stand to pray at various times as well. Simply keep an eye on the leader and those in front of you and do likewise.
