Intermittent fasting? Try the 5th century playbook

Lent is upon us – those 40 days of voluntary masochism that we moderns have mercifully put behind us. Or have we?

Julie Canlis

Julie connects Christian spirituality with ordinary life in Wenatchee, Washington State, where she teaches and writes.

A wine glass of water sits on an empty clean plate.

Daylight fasting.

Jean Fortunet, CC BY-SA 3.0, via Wikimedia Commons.

Fasting, at least in the health world, is no longer a derogatory term but one in vogue. Particularly the merits of the restricted diet, in which you limit the amount of time you eat either to a day (e.g. to an eight-hour window) or a week (e.g. skip eating on two different days). The latter approach, maybe surprisingly, follows in the footsteps of our religious forebears, who fasted every Wednesday and Friday. Could it be that they’d figured out a practice we are just discovering? And what else were they trying to achieve?

To a medieval peasant in Britain, Lent ratcheted up the twice-weekly fast. It was 40 days of a vegan diet, that often increased in intensity as the body adjusted (though the pregnant, young, sick and old were exempt). Lent also issued in much cultural creativity. Who knew that Cathedral at Rouen was a Lenten by-product, as those desperate for butter could get a dispensation by contributing financially to the Butter Towers (as they became known)? And Britons may have Lent to thank for both black peas, a Lancastrian delicacy, and fish & chips, as cooks were challenged to keep Lenten menus interesting.

Despite our caricatures of Lent as a dour and draconian time, it was essential to the enjoyment of medieval life. The purpose of Lent was not the denial but the renewal of pleasure. Maybe it’s precisely that aspect that has echoed through the centuries, manifesting now in our punishing diets, Tough Mudder races, and endurance stunts. Isn’t that a bit part of why we (well, some of us) do them?

This article was first published on March 15 2023.

'One of the principal rhythms of medieval life was this move from feasting to fasting to feasting again.'

Our modern fascination with fasting can also receive wisdom from Lent, which is that fasting for its own sake will always lead to something unhealthy. It must be for the purpose of something greater. Our forebears worried that physical practices could become idolatry, when wrenched out of their context of repentance. As G. K. Chesterton remarked,

'Physical nature must not be made the direct object of obedience; it must be enjoyed, not worshipped.'

The Old Testament prophets were particularly grumpy about this, insisting that fasting would do no good if it did not also help you love your neighbour more. Or as the early third-century Christians who fled from Roman excess into the deserts remarked,

'If you fast regularly, do not be inflated with pride; if you think highly of yourself because of it, then you had better eat meat.'

Fasting on its own will not make us better people, though we might shed a few pounds. Fasting is to restore the pleasure not only to eating, but also to the soul in need of God. Interesting that one of the primary biblical metaphors for a lively spiritual life is that of feasting and eating. Fasting resets the soul with repentance. It is praying with our body. It is not a negation but a purgation of desire – not denying our desires but resetting them. C.S. Lewis wondered whether our desires are not too strong, but too weak.

'We are half-hearted creatures, fooling about with drink and sex and ambition when infinite joy is offered to us, like an ignorant child who wants to go on making mud pies in a slum because he cannot imagine what is meant by the offer of a holiday at the sea. We are far too easily pleased.'

So if you’ve considered intermittent fasting, or even if not but you feel you might need a more balanced perspective on pleasure, consider the Lenten playbook. Feast and fast cyclically. Do it for a greater purpose than just losing weight. Let it change and reset your true desires. And maybe, just maybe, you might discover God waiting for you at the root of all your desires.

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10 March 2025

2 min read

Giles Coren dips his toe in the water - will he take the plunge?

In a disembodied digital age, he's made a decision to participate instead.

Jamie Mulvaney

Jamie is Vicar of St Michael's Chester Square, London.

A casually dressed man strides down the aisle of a church between the pews.

Danique Godwin on Unsplash

It takes a lot of courage to write about what you don’t know. Newspaper columnists and restaurant critics are paid to be omniscient, and Giles Coren is very good at channeling observation and insight into his articles in an acerbic and amusing way.

He recently wrote in The Times about what he does and doesn’t know about Christianity. He wrote with humility and humour, which amongst other things made me wonder how many of us who are part of the church would do well to be honest about what we don’t know.

The journey that Coren tells about his “not not believing” is staked along the way by the language of the church and its buildings. In other words: worship.

Belle Tindall recently wrote about the prejudice met by Kate in White Lotus when she tells her friends that she finds going to church “very moving.” To them it is “self-defeating”, but perhaps it opens us up the possibility that there is a greater centre of gravity than our own selves. Going to church has been associated with so many unhelpful divisions and distractions and often the church is to blame.

But believers and non-believers alike run the risk of missing out on so much of faith. We limit it to information and observation, when the full benefit is found in participation. Whether pilgrims, prodigals or someone else altogether, we can analyse and stand on the sidelines as much as we want, but Coren and his son are taking part:

“I gave up not going to church some time ago. Most Sundays I am there, praying and singing — another lapsed atheist hoping that the non-existent God he was brought up not to believe in doesn’t see.”

Perhaps this act, and writing about it in The Times, is even braver given our seemingly disembodied, digital, post-pandemic individualistic lives. A podcast may give you propositional truths you can accept or reject, but being caught up in worship is in a different order altogether. Coren writes:

“And I have a sense that God is there — in the tradition, the words, the 2,000 years of conviction, the imagination of all the people who came before me…”

God is the interesting thing about Christianity, and Christians believe that this God became human. Amidst all that we don’t know and don’t see, going to church makes tangible what can feel intangible.

Coren writes that the only moment he feels left out is in Communion, and that perhaps one day he will get baptised. The Greek word where we get ‘baptism’ from means to overwhelm. In an overwhelming world, more and more people are seeing the merit in being overwhelmed with God. If we are to experience this, it means that at some point we need to dive into the water.