同修會成員之間的關係應該由兄弟之愛所激發,其緊密的程度比自然家庭更完美。始終需要的是「同心合意」,正如聖經描述初期基督徒的那樣。
Relationship between religious must be inspired by brotherly love, but in a more perfect manner than in the natural family. It is necessary to have «one heart and one mind» as it was told of the early Christians (UPS IV, 218).