What is to be understood by ‘simplicity’ in Christianity?
Simplicity is, not being complicated, and in Christianity it also means, not being naive.
The Christian can be simple, i.e. straightforward and modest in character, and yet wise at the same time. Christian simplicity is a wise simplicity. Christian wisdom is an uncomplicated wisdom, by which I mean, uninvolved, not abstruse like some philosophies. This is why the Lord said: “be wise as serpents and harmless as doves. ” (Matt. 10:16).