The past, the present, the future: migration is what matters.

The past is behind, learn from it.
The future is ahead, prepare for it.
The present is here, live it.

Learn the past, watch the present, and create the future.

You can't change the past, but you can ruin the present by worrying about the future

Invent a past for the present.

Kerry is an adult - he thinks things through. He learns from the present as well as the past. To George Bush, thinking things through is for sissies.