What powerful motives did I not call to my mind to stifle it?

The desire to bolster religious beliefs with science can be a powerful motive.

That gives her a powerful motive to protect Ianira's life.

Although this may be a powerful motive, it is not the best reason.

Hence: The chief or most powerful motive; the efficient cause of action.

But passion was a powerful motive, and she had been young.

"I trust to a motive more powerful than friendship," said the soldier.

The differences in laws among states create a powerful motive for gun running.

Developing nations must be given a powerful motive to join.

Fear can be a powerful motive to change, if you know what to do to reduce the fear.