Turns out, it was a song written in 1877 that basically boils down to a musical chord that the composer hit while screwing around with his organ (the musical one, you sick people) that just brought complete clarity to everything. After it faded he was never able to find it again. The first thing I thought of was the song 'Tribute' by Tenacious D.
I like these sort of mystical kinda things. Don't know why but I find them really interesting, particularly when they move into popular culture.
Anyway, here are the lyrics to the song 'The Lost Chord' by Arthur Sullivan:
Seated one day at the organ,
I was weary and ill at ease,
And my fingers wandered idly
Over the noisy keys.
I know not what I was playing,
Or what I was dreaming then;
But I struck one chord of music,
Like the sound of a great Amen.
It flooded the crimson twilight,
Like the close of an angel's psalm,
And it lay on my fevered spirit
With a touch of infinite calm.
It quieted pain and sorrow,
Like love overcoming strife;
It seemed the harmonious echo
From our discordant life.
It linked all perplexéd meanings
Into one perfect peace,
And trembled away into silence
As if it were loth to cease.
I have sought, but I seek it vainly,
That one lost chord divine,
Which came from the soul of the organ,
And entered into mine.
It may be that death's bright angel
Will speak in that chord again,
It may be that only in Heav'n
I shall hear that grand Amen.