YHWH's duality vs. the Father's pure goodness.
YHWH boasts: "I kill and make alive; I wound and heal" (Deut 32:39), "I create evil and peace" (Isa 45:7)—a fickle and inconstant tyrant.
Christ's Father only heals and revives: "Your faith has made you whole" (Luke 17:19), no harm, no evil.