A few months ago, my husband and I discovered a local group of walkers in our village. The group meets informally every Wednesday morning and has grown over the years to around 50 people. There are a handful of committed types who turn up every week, plus dozens of others (ourselves now included) who show up regularly although not infallibly. We’ve met a variety of interesting people as a result, not least the couple behind the whole thing, both of whom appear to have an encyclopaedic knowledge of the local area and its footpaths.
So many of the local footpaths were unknown to us before we joined the group and some, it turns out, were unknown to everyone. The aforementioned couple are both of the “can-do” and “why not us?” mindset, and over the years they have taken it upon themselves to take responsibility for opening up more than one village pathway that had fallen into disuse. And as Geoff put it to me, “once you open up the pathway, people start using it and then it more or less maintains itself.” The very frequency of use is what helps to keep a pathway established.
Imagine a field of grass that people often cross to get from one side of the field to the other. Over time, a pathway forms, along which most people walk: the grass becomes trampled, the soil compacted and the green fades to brown. This becomes an established pathway and will remain so just for as long as it’s used.
Now, suppose something changes: perhaps a new gate opens, a puddle forms on the old path, or people simply find a slightly shorter or more convenient route. Gradually, walkers begin taking this new line across the field instead of the old one. At first, only a few people use the new route. The grass along it begins to show faint signs of wear — blades are bent and bruised, and a pale strip starts to appear. As the weeks go by, the new route becomes more and more popular: the flattened grass eventually dies back, leaving a firm, visible track.
Meanwhile, the old path, now seeing fewer footsteps, starts to recover. Without constant trampling, the soil loosens a little, rainwater seeps in again, and new shoots begin to grow up through the bare patches. Mosses, wildflowers, and taller grasses reclaim it, softening its edges until it blends again into the rest of the field. Within a season or two, only someone who remembers where it used to run might notice a faint difference in the undergrowth or a subtle dip in the ground. The new track has become the main path — firm and easy to follow — while the old one has disappeared back into the living fabric of the field.
This is an illustration of how habits can change: the places where we pass most often grow clearer, and those we abandon are slowly forgotten, healed over by time and growth. It is also an excellent illustration of how our brains work.
Learning is a physical process, in which the brain changes in response to experience: the brain rewires itself as we practise, think and experience. At its core, it involves the strengthening and formation of neural pathways, networks of neurons (nerve cells) which communicate through chemical signals. Every thought, every memory, every skill we acquire is encoded within these connections. Our brain is quite literally rewiring itself day by day.
Each new connection represents not only new knowledge but also the remarkable ability of the human brain to change and grow throughout life. When we first encounter new information or attempt a new skill, specific groups of neurons are activated together. If this process happens repeatedly and is done proactively, the connections between those neurons will become stronger and more efficient. This is learning. Pathways that are rarely used may weaken through a process called synaptic pruning, a process which has evolved to make the brain more efficient by eliminating redundant connections. This balance between strengthening and pruning allows the brain to adapt continuously to new experiences and environments. Being aware of this is essential to an understanding of how we learn.
The brain’s remarkable ability to adapt and change is known as neuro-plasticity. As Canadian psychologist Donald Hebb said as early as 1949, “neurons that fire together, wire together”. Each time a pathway is used, the brain reinforces it, making it easier to activate in the future. Over time, this repetition transforms a once-effortful action into an automatic one. This, fundamentally, is why we get into habits – both good and bad. The really great news is that bad habits can be replaced with new ones: you simply have to start following the paths less travelled and keep treading upon them until they turn into the new, preferred pathway. The road less travelled may be difficult to start upon, but will become an established thoroughfare with repeated use.
