Eternity! O, dread and dire word. Eternity! What mind of man can understand it?

Death followed by eternity the worst of both worlds. It is a terrible thought.

We're always thinking of eternity as an idea that cannot be understood, something immense. But why must it be? What if, instead of all this, you suddenly find just a little room there, something like a village bath-house, grimy, and spiders in every corner, and that's all eternity is. Sometimes, you know, I can't help feeling that that's what it is.

Eternity isn’t some later time. Eternity isn’t some long time. Eternity has nothing to do with time. Eternity is that dimension between here and now, where thinking and time cuts out. If you won’t get it here, you won’t get it anywhere. The experience of eternity right here and now is the function of life

Eternity isn't some later time. Eternity isn't even a long time. Eternity has nothing to do with time. Eternity is that dimension of here and now that all thinking in temporal terms cuts off.... the experience of eternity right here and now, in all things, whether thought of as good or as evil, is the function of life.

The final end of Eternity, and the beginning of Infinity

L'éternité, c'est long ... surtout vers la fin.

Eternity is a very long time, especially towards the end.

Esta es la revelación de la eternidad, Orfeo, de la terrible eternidad. Cuando el hombre se queda a solas y cierra los ojos al porvenir, al ensueño, se le revela el abismo pavoroso de la eternidad. La eternidad no es porvenir. Cuando morimos nos da la muerte media vuelta en nuestra órbita y emprendemos la marcha hacia atrás, hacia el pasado, hacia lo que fue. Y así, sin término, devanando la madeja de nuestro destino, deshaciendo todo el infinito que en una eternidad nos ha hecho, caminando a la nada, sin llegar nunca a ella, pues que ella nunca fue.

For the first time the specific and express thought came to him. And though he pushed it away in horror, he knew that, having once come, it would return. The thought was simply this: That he would ruin Eternity, if he had to. The worst of it was that he knew he had the power to do it.

the concept of eternity must not be grasped as if it were suspended time, or in any case not in the sense that eternity would come after time, for this would turn eternity into the future, in other words into a moment of time. And the concept of eternity must also not be understood in the sense of a negation of time, so that it would be merely an abstraction of time. For time in its concept is, like the concept itself generally, eternal, and therefore also absolute presence.

For a number of years he had lived, eaten, laughed, loved, hoped, like everyone else. And for him it was over, over for good. A life! A few days, and the nothing! You're born, you grow up, you're happy, you wait, then you die. Goodbye! Man or woman, you'll never return to this earth! And yet each of us bears within him the fierce, unrealizable longing for eternity, each of us is a kind of universe within the universe, and each of us soon vanishes completely into the dunghill of new organisms. Plants, animals, men, stars, worlds, everything quickens, then dies, in order to transform itself. And nothing ever returns, whether insect, man, or planet!

I look upon time as no more than an idea, and I consider eternity as another possibility

Eternity is not ever-lasting time but the real, unfading, indestructible, and timeless Present, for, as Schroedinger said, the present is the only thing that has no end.