Excerpted from: Dom Guéranger on Ash Wednesday

The enemies we have to fight with, are of two kinds: internal, and external. The first are our passions; the second are the devils. Both were brought on us by pride, and man's pride began when he refused to obey his God. God forgave him his sin, but He punished him. The punishment was death, and this was the form of the divine sentence: 'Thou art dust, and into dust thou shalt return'. Oh that we had remembered this! The recollection of what we are and what we are to be, would have checked that haughty rebellion, which has so often led us to break the law of God.

And if, for the time to come, we would preserve in loyalty to Him, we must humble ourselves, accept the sentence, and look on this present life as a path to the grave. The path may be long or short; but to the tomb it must lead us. Remembering this, we shall see all things in their true light.

We shall love that God, who has deigned to set His heart on us. Notwithstanding our being creatures of death: we shall hate, with deepest contrition, the insolence and ingratitude, wherewith we have spent so many of our few days of life, that is, in sinning against our heavenly Father: and we shall be not only willing, but eager, to go through these days of penance, which He so mercifully gives us for making reparation to His offended justice.