The Christian's life in all its aspects-intellectual and ethical, devotional and relational, upsurging in worship and outgoing in witness-is supernatural; only the Spirit can initiate and sustain it. So apart from him, not only will there be no lively believers and no lively congregations, there will be no believers and no congregations at all.
J. I. Packer (2005). “Keep in Step with the Spirit: Finding Fullness in Our Walk with God”, p.15, Baker Books