(Kadamba Kanana Swami, 06 August 2012, Ljubljana, The Balkans, Lecture: The pastimes of Krsna)
When Krsna walks in Vrindavan as Madhava, carrying his flute tucked in his belt, then the trees which have branches laden with fruits and flowers, are trying to touch Krsna’s feet. The bees are just singing the glories of Krsna. Bhagavatam says that these bees must have been great devotee sages in their last life.
The trees are thinking, ‘We are so unfortunate. It is due to our sinful activities that we have taken birth as trees and therefore we cannot follow Krsna on his pastimes in the forest.’
Of course, Bhagavatam points out that Lord Brahma is praying to become a tree in Vrindavan so how can it be that they have committed sinful activities and offenses rather, these trees are the most fortunate because, after all, one moment of association with the Supreme Personality of Godhead, one moment of devotional service to the Supreme Lord, is such great fortune!
Even if Krsna walks past these trees only sometimes still they are in the forest of Vrindavan! They may not be able to walk behind him but they can hear him. It is stated in the Mahabharat that trees have eyes and ears. It is said that trees can see and hear. So these trees are hearing and seeing Krsna! Quite auspicious, actually!