Only through love can we obtain communion with God.
Ethical existence [is] the highest manifestation of spirituality.
There is much coldness among men because we do not dare to be as cordial as we really are.
The quiet conscience is an invention of the devil.
As soon as man does not take his existence for granted, but beholds it as something unfathomably mysterious, thought begins.
One truth stands firm. All that happens in world history rests on something spiritual. If the spiritual is strong, it creates world history. If it is weak, it suffers world history.