He Who Loves Me
While good works play no part in justification, nor—I would argue, contra Iain Murray and many other fine theologians—do they have any causal relationship to sanctification, they are a necessary ground for assurance of salvation.
Those who conclude that because works and obedience have no place in the believers justification, therefore they need have no place in assurance, are . . . in serious error. Christ teaches emphatically that the assuring work of the Spirit and the comfort of his presence is related to obedience: ‘He who has my commandments and keeps them, it is he who loves me. and he who loves me will be loved by my Father, and I will love him and manifest myself to him’ (John 14:21). J. C. Ryle is commenting on this same truth when he writes: ‘I bless God that our salvation in no wise depends on our own works . . . But I would never have any believer forget that our sense of salvation depends much on our manner of living. Inconsistency will dim our eyes and bring clouds between us and the sun.’
—Iain Murray, The Old Evangelicalism (Banner of Truth, 2005), 181.