“Life is, at best, an uncertain path. Perhaps, we should be grateful with what we have, for even these riches may disappear along the way.”
An alien race that has no concept of time uses wormholes to find planets with living creatures and enter them as hosts. When the host is asleep, they use a wormhole to abduct them and transport them to their home world where they can learn everything the host has experienced. However, since the aliens have no concept of the passage of time, they aren't realizing that each time they return their host — Trevor — home, they are returning him 10 years later each time (due to the effects of relativistic time dilation), putting him further out of touch with everything he loves. At the end they remove the connection and send him back to the night he first left; he has his life back, and nobody knows what happened, except Trevor, who retains the memory of his experiences.
“Don't be afraid; people are so afraid; don't be afraid to live in the raw wind, naked, alone...Learn at least this: What you are capable of. Let nothing stand in your way.”
― Tony Kushner, Angels in America, Part One: Millennium Approaches