Between three and four in the morning, the awakening of birds: a solo blackbird or nightingale, surrounded by a shimmer of sound, by a halo of trills lost very high in the trees.
The power of this mighty angel, a rainbow upon his head and clothed with a cloud, who sets one foot on the sea and one foot on the earth, sweet cascades of blue-orange.  
The abyss is Time with its sadness, it weariness.  The birds, our desire for light, for the stars, for jubilant songs.
The angel appears, especially the rainbow that covers him.  In my dreams, I hear and see ordered chords and melodies, known colors and shapes; then, after this transitional stages, I pass through the unreal and suffer, with ecstasy, a tournament; superhuman sounds and colors.  These swords of fire, this blue-orange lava, these sudden stars: there is the tangle, there are the rainbows!
It is all love.  Its slow ascent to the acutely extreme is the ascent of man to his Paradise.  
Messiaen – Quartet for the End of Time
Sverrisson – Afternoon Variant
Roussel – Aeneas
Dutilleaux – String Quartet “Ainsi la nuit”