Sunrise doesnt't't last all morning
A cloudburst doesnt't't last all day
Seems my love is up and has left you with no warning
Its not always going to be this grey
All things must pass
All things must pass away
Sunset doesnt't't last all evening
A mind can blow those clouds away
After all this, my love is up and must be leaving
Its not always going to be this grey
All things must pass
All things must pass away
All things must pass
None of lifes strings can last
So, I must be on my way
And face another day
Now the darkness only stays the night-time
In the morning it will fade away
Daylight is good at arriving at the right time
Its not always going to be this grey
All things must pass
All things must pass away
All things must pass
All things must pass away [ Lyrics from: http://www.lyricsmode.com/lyrics/g/george_harrison/all_things_must_pass.html ]
Knowing only a small portion of georges spiritual background, this song to me is a struggle with that (which i can relate to). He is relalting the passing beauty of the world (sunrise,cloudburst,sunset) to his "ebb and flow" connection with god. And if he can endure through these periods of disconnection, even if it seems his love has left it hasn't.