Why: one who abandons scriptural injunctions and acts according to the impulse of desire does not attain perfection, happiness, or the highest goal, naming impulsive, desire-driven action, specifically outside any considered framework, as ultimately unsatisfying regardless of short-term appeal.

In life: acting purely on impulse, outside any considered framework of values, tends to produce short-term satisfaction at best, rather than the sustained sense of fulfillment that considered, values-aligned action actually produces over time.

Teaching: before an impulsive decision driven purely by immediate desire, check it against your own considered framework of values first, this verse suggests the impulsive version, however appealing in the moment, tends not to produce lasting satisfaction the way the considered version would.