The will and the energy of God is the effective and foreseeing cause of every time and place and age, and of every nature. The will is the reason (λόγος) of the intellectual soul, which [reason] is within us, inasmuch as it is the faculty belonging to it which is endowed with freedom of action. The will is the mind desiring [some object], and an appetite possessed of intelligence, yearning after that thing which is desired.
Source: Fragments from the Lost Writings of Irenaeus (New Advent)