You were taught, with regard to your former way of life, to put off your old self, which is being corrupted by its deceitful desires; to be made new in the attitude of your minds; and to put on the new self, created to be like God in true righteousness and holiness.
Purgation is never far from Lenten spirituality. The discipline of fasting, and of chastened habits helps us to cast aside the things that hinder us and attend to the stuff that matters. The purgative way is integral to true spirituality. We will not grasp for God with our hands full. There has to be some letting go.
The Christian Mystical tradition places purgation as an early stage of the spiritual life. The mystics name these stages: Purgation, Illumination, Union. There is a purgative stage of stripping off the old self—patterns of behavior, false beliefs, self-centeredness and petty idolatries. Then the ground is paved for deeper spiritual insight and experience (illumination). The illuminative stage likewise involves a letting go of self, but the primary energy is directed at training one’s attention on God. In the final stage, the soul is stripped of self and united with the Divine (union).
These stages roughly describe the shape of spiritual maturity. Purgation is for beginners, Illumination is the promise of those on the way, Union is our telos. However, the spiritual life, like other aspects of life does not always follow a straight ascent. Purgation-Illumination-Union is the cycle of Christian Spirituality: we let go, we attend, we commune.
If that is a little abstract, don’t worry about it. The point is that spiritual progress involves a purge of our old life as we make room for something new. The Apostle Paul instructed the Ephesians to “put off their old self, which was corrupted by its deceitful desires.” For converts in the Ancient world, this meant letting go of religious ideas and the ubiquitous pagan idolatry and learning to locate their lives within YHWH’s story and the redemption Christ brings. It also meant for them, as for us, disciplining passions and desires—the drive for success, greed, covetousness, lust, pride—and seek to follow Jesus wholeheartedly.
The mystics are right that purgation is felt most acutely by those who are beginners in the spiritual journey. It involves a radical reorienting of our thoughts, hopes, and actions. This is conversion. But the purgative way isn’t just the purview of beginners. Wherever you are in your spiritual life, there are things you need to purge: attachments to people, faulty understanding, false beliefs about yourself, harmful habits, past hurts, unforgiveness and bitterness, shame. We will not grasp God with our hands full. There has to be some letting go.