g. the joy of a needy but well-meaning man at becoming the heir of an affectionate but penurious father); or how a deep grief may satisfy the person experiencing it (the sorrow of a widow at the death of her excellent husband); or how a gratification can in addition satisfy (as in the sciences that we pursue); or how a grief (e.g. hatred, envy, revenge) can moreover dissatisfy. The satisfaction or dissatisfaction here depends on Reason, and is the same as approbation or disapprobation; but gratification and grief can only rest on the feeling or prospect of a possible (on whatever grounds) well-being or its opposite.

All changing free play of sensations (that have no design at their basis) gratifies, because it promotes the feeling of health.