Ecclesia was a word used In the ancient Greek world for a general assembly or political gathering, especially: the periodic meeting of the Athenian citizens for conducting public business and considering affairs proposed by the council. In Christianity, it means a particular body of faithful people and the whole body of the faithful. God never works alone but always works in Communion, that is, with the father, son, and the Holy Spirit (The Trinity.) He extended that fellowship to Christians, saying that God is there where two or three are gathered in my name. The Church can be formal or informal. It is the coming together in Christ's name that is the important thing. Even in the Old Testament, the Israelites always gathered from time to time to seek God's faith. Even though your faith is personal, it also has a corporate responsibility.