Like the sky

Awareness is like the sky.  Consciousness is like a bird in the sky.  Birds fly into sight and out of sight.  If one concentrates on the movement of birds, one will lose concentration repeatedly. 

p264, Tracts of the Sun : An Earth Orbit of Vajrayana Expressions.  Ngakpa Chögyam and Khandro Déchen, Aro Books, 2022, ISBN 978-1-898185-28-4