Hexagram 4: enveloping; R Wilhelm 4: youthful folly; Hua-Ching Ni 4: the undeveloped one; HDS Gate 4: gate of formulization, youthful folly; S Rifler 4: youthful ignorance; J Blofeld 4: immaturity, uncultivated growth; S Karcher 4: enveloping/royal maiden; GeneKey 4: a universal panacea