On this tree is a bird:
   It dances in the joy of life.
 No one knows where it is:
   And who knows what the burden
     Of its music may be?
 Where the branches throw a deep shade,
   There does it have its nest:
     And it comes in the evening 
     And flies away in the morning,
     And says not a word 
       Of that which it means.
 None tell me of this bird 
     That sings within me.
   It is neither coloured nor colourless:
   It has neither form nor outline:
   It sits in the shadow of love.
   It dwells within the Unattainable,
     The Infinite, and the Eternal;
       And no one marks 
         When it comes and goes.
 Kabir says, “O brother Sadhu! 
   Deep is the mystery. 
   Let wise men seek to know 
     where rests that bird.”

NOTE: This is the translation by Rabindranath Tagore from the 1915 text, One Hundred Poems of Kabir. This is poem #30 (XXX) of that volume.