“La puerta del cielo” means “The door of the sky” in Spanish.
English translation of the lyrics:
“There inside the channel, at the mountain’s foot, it seems that you can hear some (animal) bells. The flock is going slowly, if it is really moving. (x2) Inside, the singing of the crickets and an owl claim its tranquility and that smelling that reminds me wet barn straws Down there, inside the channel, at the mountain’s foot, it seems that you can hear some (animal) bells From barn straws, from wet barn straw”
Listening to the song is like expanding our awareness to be conscious of the beauty and activity of Nature around us – the movement of the flock, the singing of the cricket, the drifting of the clouds – it’s like dwelling in higher consciousness of love and harmony, hence the apt title “The door of the sky”.