Sefer HaBahir 37

1[Mar Rachumai's students asked,] "What is patach?" [He said,] "An opening [petach]." [They asked,] "And what is an opening?" [He replied,] "It is a north wind, which opens to the whole world. From the gate through which the evil came out, the good comes out." [They asked,] "And what is 'good'?” He mocked them, "Didn't I say to you, 'a small patach'?" They said to him, "We forgot. Teach us." He repeated [the teachings from 34 and 36, above]. He said to them, "To what can this be compared? To a king who has a throne. Sometimes he takes it on his arm and sometimes on his head." They said to him, "Why?" [He replied,] "Because it is beautiful and [it would be] a pity to sit upon it." They said, "Where does he place it on his head?" He said to them, "In the open mem, as it is written, 'Truth sprouts from the land, and righteousness looks down from the heavens.' (Psalms 85:12)"