Don't look back, they might be gaining on you.

Hindsight is always 50/50.

Hindsight is an exact science.

Which of our unnoticed isms will the hindsight of future generations condemn?

Hindsight being 20/20, I probably wouldn't have done it.

No...We wouldn't all do what we did do then...but to live in the moment makes our hindsight grin!