Incentive

Inciting; encouraging or moving; rousing to action; stimulative.

Serving to kindle or set on fire.

That which moves or influences the mind, or operates on the passions; that which incites, or has a tendency to incite, to determination or action; that which prompts to good or ill; motive; spur; as, the love of money, and the desire of promotion, are two powerful incentives to action.

a positive motivational influence