Venial sin, in Catholic theology, refers to minor transgressions that do not sever one's relationship with God or bring about eternal condemnation, though they diminish spiritual virtue. Thinkers such as St. Thomas Aquinas described it as a partial loss of grace, distinguishing it from mortal sin through lesser fault, awareness, or will.
Jean-Pierre Camus compared it to an obstacle that hinders spiritual growth, while William Alexander urged against underestimating its significance. George Hay warned that unaddressed venial sins gradually weaken one's resistance to mortal sin. These viewpoints together highlight venial sin's role as a subtle but cumulative influence, shaping the soul's journey toward holiness or damnation.