Our sages teach, when Moshiach comes, we won’t serve God as Abraham, who though being obviously great, also gave rise to Yishmoel, the opposite of holy love; undisciplined, unruly, selfish lust; nor as Isaac, who obviously being great, gave birth to Eisav, the opposite of holy-discipline, for he was a murderer; rather, like Jacob, for Jacob realized, all human thoughts, all human opinions, all human, even holy dispositions, as they are human, can just as easily flip to unholiness; hence, love can become undisciplined, unruly, selfish lust, and holy discipline, can become harshness, cruelty, leading actually to judging people to death.