And be not conformed to this world: but be transformed by the renewing of your mind, that you may prove what is that good, and acceptable, and perfect, will of God.
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Gregory of Nyssa
AD 394
The perfect will of God is that the soul be changed by reverence, having been brought to the full flower of its beauty by the grace of the Spirit, which attends to the sufferings of the person who undergoes the change.