What we need is not so much personal development, as personal replacement: What we need is not so much personal development, but personal substitution.
When we get hung up on the non-essentials, the essentials have no opportunity to make a significant appearance.
We're all in full-time Christian service. We have different disguises, but the same vocation; to be out and out lovers and servants of the Lord Jesus Christ... no dichotomy exists between ministry and lifestyle.