The Kingdom of God Is… — Thomas Merton

The Kingdom of God is, then, not the Kingdom of those who merely preach a doctrine or follow certain religious practices: it is the Kingdom of those who love. To build the Kingdom of God is to build a society that is based entirely on freedom and love. It is to build a society which is founded on respect for the individual person, since only persons are capable of love. — Disputed Questions, p. 142, Kindle version