I've managed to read The Four Quartets at least a thousand times without ever having bothered to look up hebetude and appetency. I don't know why. It's not that I'm averse to dictionaries.
First, hebetude means lethargy, as in:
The serenity only a deliberate hebetude,
The wisdom only the knowledge of dead secrets
Useless in the darkness into which they peered
Or from which they turned their eyes. There is, it seems to us,
At best, only a limited value
In the knowledge derived from experience.
- East Coker
Appetency means desire or appetite and comes from the section in which Eliot describes travelling on the London Underground. It remains the greatest description of the Tube ever written. You should also note that eructation is belching.
Here is a place of disaffection
Time before and time after
In a dim light: neither daylight
Investing form with lucid stillness
Turning shadow into transient beauty
With slow rotation suggesting permanence
Nor darkness to purify the soul
Emptying the sensual with deprivation
Cleansing affection from the temporal.
Neither plenitude nor vacancy. Only a flicker
Over the strained time-ridden faces
Distracted from distraction by distraction
Filled with fancies and empty of meaning
Tumid apathy with no concentration
Men and bits of paper, whirled by the cold wind
That blows before and after time,
Wind in and out of unwholesome lungs
Time before and time after.
Eructation of unhealthy souls
Into the faded air, the torpid
Driven on the wind that sweeps the gloomy hills of London,
Hampstead and Clerkenwell, Campden and Putney,
Highgate, Primrose and Ludgate. Not here
Not here the darkness, in this twittering world.
Descend lower, descend only
Into the world of perpetual solitude,
World not world, but that which is not world,
Internal darkness, deprivation
And destitution of all property,
Desiccation of the world of sense,
Evacuation of the world of fancy,
Inoperancy of the world of spirit;
This is the one way, and the other
Is the same, not in movement
But abstention from movement; while the world moves
In appetency, on its metalled ways
Of time past and time future.
- Burnt Norton
The video below is meant for foul-mouthed Londoners only.