Mortification is the soul's vigorous opposition to self, wherein sincerity is most evident.

Do you mortify; do you make it your daily work; be always at it whilst you live; cease not a day from this work; be killing sin or it will be killing you.

For to pretend that men may live habitually sinful lives without any attempt by the Spirit to mortify sin in them, nor with any desire for repentance, is to deny the Christian religion.

The least grace is a better security for heaven than the greatest gifts or privileges whatsoever.

The foundation of true holiness and true Christian worship is the doctrine of the gospel, what we are to believe. So when Christian doctrine is neglected, forsaken, or corrupted, true holiness and worship will also be neglected, forsaken, and corrupted.

Sin also carries on its war by entangling the affections and drawing them into an alliance against the mind. Grace may be enthroned in the mind, but if sin controls the affections, it has seized a fort from which it will continually assault the soul. Hence, as we shall see, mortification is chiefly directed to take place upon the affections.

The vigour, and power, and comfort of our spiritual life depends on the mortification of the deeds of the flesh.