Dr. Martin Picard

If you touch something and it's body temperature, the same temperature as your hand, you don't feel it.

You don't feel room temperature or body temperature.

What you feel, if you touch something that's cooler than your body, what you're feeling is not the temperature of what you're touching.

You're feeling your temperature leaving your body.

It's the heat of your body leaving through conduction towards this.

And then that's what you experience.

And if you touch something that's hot, you're not feeling the energy of the thing.

You're feeling the heat that's coming into your body.

So you feel that delta and that change.

And that's how human perception also works.

Like we're able to see colors, to see light.

You've studied the visual system a lot.

Fundamentally, the ability of the eye of the retina to perceive, to sense light requires that you bring photons that are beaming from whatever source, short, long wavelength.

You need to bring them into stillness.

You need to resist the flow of photons.

So you change the speed of the photon, and it's that change in energy.

You get kinetic energy, speed of light, and then boom, when the delta V, the change in speed happens, this is when you can trigger a calcium release and then molecular series of events and action potential.

So in order to see, you need to resist the flow of photons.

You need to resist energy movement and then that triggers a transformation.

Same for hearing.