One of my favorite poems of all time:
Psyche with the candle
Archibald MacLeish (1892-1982)
Love which is the most difficult mystery
Asking from every young one answers
And most from those most eager and most beautiful--
Love is a bird in a fist:
To hold it hides it, to look at it lets it go.
It will twist loose if you lift so much as a finger.
It will stay if you cover it-- stay but unknown and
Either you keep it forever with fist closed
Or let it fling
Singing in fervor of sun and in song vanish.
There is no answer other to this mystery.