Eternity is not a time after death. Eternity has nothing to do with time. Eternity is timeless and present all the time.
Infinity has nothing to do with time or space.
The Infinite occupies every bit of space. The Eternal occupies every moment of time. Immortality is already ours. Only the mind's attachments to mortal aims has deprived us of this knowledge. In this very body is our eternal life,Here and now,in this earth,in the aspect of time.