Well, the future for me is already a thing of the past.

The future belongs to those who prepare for it today.

Prediction is very difficult, especially if it's about the future.

Look back over the past, with its changing empires that rose and fell, and you can foresee the future, too.

It is not enough to understand, or to see clearly. The future will be shaped in the arena of human activity, by those willing to commit their minds and their bodies to the task.