One must not, however, imagine the realm of culture as some sort of spatial whole, having boundaries but also having internal territory. The realm of culture has no internal territory: it is entirely distributed along the boundaries, boundaries pass everywhere, through its every aspect…. Every cultural act lives essentially on the boundaries: in this is its seriousness and significance; abstracted from boundaries it loses its soil, it becomes empty, arrogant, it degenerates and dies.

— Mikhail Bakhtin, from a late essay translated by Gary Saul Morson and Caryl Emerson. This is one of my foundational beliefs: it governs many of my choices, especially about what I read and whom I converse with — and on social media also. Choose wisely and carefully the people you follow on Twitter and you can create a digital version of Bakhtinian/Dostoevskian polyphony.