” His one desire, is the one design of his life, namely, ‘not to do his own will, but the will of Him that sent him’ His one intention at all times and in all things is, not to please himself, but Him whom his soul loveth. He has a single eye. And because “his eye is single, his whole body is full of light.” Indeed, where the loving eye of the soul is continually fixed upon God, there can be no darkness at all, ‘but the whole is light; as when the bright shining of a candle doth enlighten a house.” God then reigns alone. All that is in the soul is holiness to the Lord. There is not a motion in his heart, but is according to His will. Every thought that arises points to Him, and is in obedience to the law of Christ.”
~ John Wesley