If by eternity is understood not endless temporal duration but timelessness, then he lives eternally who lives in the present.

This present moment, since it knows neither past nor future, is itself timeless, and that which is timeless is Eternal. Thus “the eternal life belongs to those who live in the present.

The eternal life is given to those who live in the present.

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.

Si se entiende por eternidad, no la duración temporal sin fin, sino la ausencia de tiempo, vive eternamente el que vive en el presente.

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.

Death is not an event in life: we do not live to experience death. If we take eternity to mean not infinite temporal duration but timelessness, then eternal life belongs to those who live in the present. Our life has no end in the way in which our visual field has no limits.

"Eternal Life" is life itself, real life, which can also be lived in the present age and is no longer challenged by physical death.

"We have eternity, beloved."
"You may have eternity. I have only now."
"But this is eternity."

Life exists only at this very moment, and in this moment it is infinite and eternal. For the present moment is infinitely small; before we can measure it, it has gone, and yet it exists forever. . . . You may believe yourself out of harmony with life and its eternal Now; but you cannot be, for you are life and exist Now.” — from Become What You Are

Life exists only at this very moment, and in this moment it is infinite and eternal. For the present moment is infinitely small; before we can measure it, it has gone, and yet it persists for ever.

Time explodes, so again, eternity is not something everlasting. You can have it right here, now, in your experience of your earthly relationships. I've lost a lot of friends,...that moment when I was with them has an everlasting quality about it that is now still with me. What it gave me then is still with me, and there's a kind of intimation of immortality in that.

The philosophical I is not the man, not the human body or the human soul of which psychology treats, but the metaphysical subject, the limit -not a part of the world.
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If by eternity is understood not endless temporal duration but timelessness, then he lives eternally who lives in the present.