In the context of the Azzard Equation, a reward is the pay-back for a morally positive creative decision.
Valid for humanists, atheists & people of faith the reward can take many forms. Examples range from an enhanced sense of self-worth to credit for entry into an afterlife with many variations in between.
In the novel Infinite Dream, the central character Jack Hallis sees it simply as the means of reaching his murdered lover. For a man of his advantages, however, the deed must be large with deep impact to qualify.
Whether motivation for reward is an explicit, conscious driver or something more subtle is a matter of debate.