Those who cannot change their minds cannot change anything.

Personally, I am stuck with one foot in the past and one foot in the present.

You should always take the best from the past, leave the worst back there and go forward into the future.

The distinction between past, present and future is only an illusion, however persistent.

Don't waste your time away thinkin' 'bout yesterday's blues.

The cause of today is the effect of the past and the cause for the future.