"If we would accept heaven's life, we need by all means to live in the world and to participate in its duties and affairs. In this way, we accept a spiritual life by means of our moral and civic life; and there is no other way a spiritual life can be formed within us, no other way our spirits can be prepared for heaven. This is because living an inner life and not an outer life at the same time is like living in a house that has no foundation, that gradually either settles or develops gaping cracks or totters until it collapses."