
Light, Power and Wisdom (1959), p. 6; note that the short phrase "Be good, do good" had occurred in spiritual teachings of others in the 19th century, usually in conjunction with other injunctions. "Be Good, Do Good" became a prominent motto of the Divine Life Society.
Light, Power and Wisdom (1959), p. 207
Variant: Be good, do good, be kind, be compassionate.