as being obliged to yield perfect obedience, and compare our hearts and lives with the law which requires this, we shall see nothing but holiness and purity on the one hand, and a wretched mass of corruption and impurity on the other. God demands perfect obedience, while we are unable of ourselves to perform any obedience; and our best duties being attended with many imperfections, we are led to be humbled under a sense of sin, whatever thoughts we formerly had of ourselves. When ‘the law enters,