The next emanation after Yoshamin is "the messenger of life" (Manda d'hayye, literally yvC61s Tits wi s), the most important figure in the entire system, the mediator and redeemer, the Xbyos and the Christ of the Mandaeans, from whom, as already stated, they take their name.
The principal works of Gregory Thaumaturgus are the Panegyricus in Origenem (Eis 't ptybniv iravrnvpucos Xbyos), which he wrote when on the point of leaving the school of that great master (it contains a valuable minute description of Origen's mode of instruction), a Metaphrasis in Ecclesiasten, characterized by Jerome as " short but useful "; and an Epistola canonica, which treats of the discipline to be undergone by those Christians who under pressure of persecution had relapsed into paganism, but desired to be restored to the privileges of the Church.
Rather it began as a science of reasoning (Xbyos), of syllogism (vvXXoycvA6s), of deductive inference.
Now, to the Stoics nothing passes unexplained; there is a reason (Xbyos) for everything in nature.
For, if the members of a natural kind had no common idea to unite them, scientific research, having nothing objective in view, could at best afford a Aoyos or definition of the appropriate particulars; and, as the discrimination of the One and the Good implied the progression of particulars towards perfection, such a Xbyos or definition could have only a temporary value.