Heart-suffering because of sin is the best proof that the Holy Spirit dwells in your heart.
Johann ArndtYet, so far from laboring to know the forbidden tree of worldly pleasures and its various fruits, man gives himself up to a careless and thoughtless state of life, and yields to the lust of the flesh, not considering that this lust is really the forbidden tree.
Johann ArndtConsider then, O man! whether there can be anything more wretched and poor, more naked and miserable, than man when he dies, if he be not clothed with Christ's righteousness, and enriched in his God.
Johann ArndtFor even these are no less bestowed on him of pure grace, than are righteousness and salvation themselves.
Johann Arndt