“The growth of the soul may be compared to the growth of a plant. In both cases, no new properties are imparted by the operation of external causes, but only the inward tendencies are called into action and clothed with strength.” MaySoulActionCausesGrowthCasesPropertyPlantTendenciesOperationsInward Book:Discourses on the philosophy of religion: addresses to doubters who wish to believe Source: Discourses on the philosophy of religion: addresses to doubters who wish to believe