Unity is this: that a man feel himself to be gathered together with all his powers in the unity of his heart. Unity brings inward peace and restfulness of heart. Unity of heart is a bond which draws together body and soul, heart and senses, and all the outward and inward powers and encloses them in the union of love.
Quoted in Message of the East, Vol. 15 (1926) by Cohasset Vedanta Centre, p. 212