What is the most valuable gift one can give?

I live HERE (a small geographical part of this world) and NOW (a moment on this one way timescale). But there is a world inside my mind, where space and time follow different rules. People who are not HERE and NOW may exist THERE inside my mind world, in my memory.
The most valuable gift is to exist in the mind world of another person, because that existence is not bound by time and space.`
There are few special people who not only live there, but they guide me when I am lost, they pick me up when I fall, they console me when I am sad, they are stern when I make mistakes…their voices have mingled with my conscience. Those are the few who I can call my GURUS. On this auspicious day of guru poornima, I want to give this dakshina to those teachers- A gift of remembrance.