 Regarding the rationality of hope, Aquinas has a nuanced view. On the one hand, he admits that a lack of experience can make one unaware of obstacles. This tendency (and drunkenness, ST I-II 40.6) can promote (irrational) hope. On the other hand, he assumes that hope can promote rational agency: As hope incorporates both knowledge of the possible and knowledge of the difficulties to reach the desired outcome, it can motivate agents to devote energy to their activities.