Their case shows how personal forces often drive the research enterprise.

But as his career developed, he began to feel a distance from the personal forces that had made him a musician.

Charity and personal force are the only investments worth any thing.

All dictators have some kind of personal force that can be very attractive for people.

"He's a man of great personal force and power," she told him.

Yet these individuals were playthings of vast, barely personal forces.

The whole coalition has been kept glued together by the personal force and leadership of one man.

The army was seen as the crown's personal force.

The competition is transferred from war to politics and trade, but the personal force appears readily enough in these new arenas.

"That will leave you without a personal force in Amber."