Chocky explicity proposed that thought was faster than light "because thought has no mass".
I like John Wyndham's novels, too. But I don't consult him to keep abreast of the latest cosmological theories. He is way off the beam here - literally. Light has no (rest) mass either, and it obviously can't go "faster than light"
I don't actually like the term "the speed of light" as longhand for c. It isn't special because it is the speed that light goes at.
It is the fastest speed possible in this universe. It is the
cosmic speed limit.
In order to accelerate, an massive object needs to be supplied with accelerating energy. Once it reaches an appreciable fraction of the light, Newton starts to lose traction and special relativity begins to take over.
Some of the energy begins to go into mass (remember, E=mc
2)
So now the object is heavier and harder to accelerate. So even more energy needs to be poured in, which makes the object even heavier and harder to accelerate further. This is a losing battle and has been proven with highly accelerated cosmic particles: they are rattling along at a fair old speed, but still very sub-light: but they hit like express trains, metaphorically speaking.
Even infinite energy cannot accelerate a massive object to the speed of light.
Now, the less rest mass an object has, the closer it can get to c, as the mass increase is related to rest mass. However, the best chance an object has to reach c is if it has
zero rest mass.
Photons (the quanta of electromagnetism) meet this requirement (they do have
relativistic mass because of their speed, but that's a different matter). So do gluons (the quanta of the strong nuclear force), but they are locked up tight in hadrons (protons and neutrons) and can't escape.
So the absolute Usain Bolts of the universe are photons. They can go fast as it is possible for
anything to go, because they have no rest mass. Anything with mass is condemned to a slower speed.
In fact, a photon cannot go at any other speed.
There is a maximum speed limit in the universe, and only light can reach it.