Prayer is the strongest union between souls. When you are engaged in prayer with a group, it is like cement which binds you together. It is not merely your physical proximity to one another. If you wish to join with other souls who are far away and wish to help them as they traverse toward God, this is done through prayer. Your prayers on behalf of others unite your soul with others. It is like cutting a pathway which is deep uniting two streams which are separated. The water from one stream will find its course by joining in strength with the other.