This phrase refers to the 4th century Greek philosopher Diogenes's response to the question of whether motion is real -- he got up and walked. "It is solved by walking."
As it turns out, there are many other problems to which walking is the solution. For instance: In our culture of overwork, burnout, and exhaustion, how do we tap into our creativity, our wisdom, our capacity for wonder, our well-being and our ability to connect with what we really value? Solvitur ambulando.
By walking we move through the world not just physically, but also spiritually. Often by "taking a walk" we mean that we're not walking to get anywhere in particular. But even when we are walking toward a destination, when we're walking to connect two places, the in-between -- the space, the interval -- can be more important.