Ecclesiaste 7:14 Cabala: Or Neerav, Sefer Yetzirah Gra Version, Assarah Perakim L'Ramchal & Baal HaSulam's Introduction to Zohar

After [the passage] dealt with the sin of one who reveals [mysteries] to the wicked, one can understand the opposite—the eminence of the righteous, for also this opposite, that did God make (Eccles. 7:14). [Thus] “those who reveal mysteries to the righteous cause the righteous.” By revealing the mystery to the righteous, [the teacher] causes emanation from the source on high, which is Tiferet, to Yesod. Thereupon Yesod clarifies these mysteries [in passing them] to Malkhut. This is [why the passage] states “cause the righteous,” which is Yesod, “enlightenment in the mysteries of the Torah,” which is the mystery of the emanation from Tiferet, termed “Torah,” to the Shekhinah. This is its path.

"Also God made one opposite the other" (Ecclesiastes 7:14)./ Good opposite evil,/ Evil opposite good./ Good from good/ Evil from evil./ Good defines evil/ And evil defines good./ Good is kept for the good ones/ And evil is kept for the evil ones.

The O"S, how so? This is what is written: "I form the light, and I create darkness; I make peace, and I create evil" (Isaiah 45:7). Form light, this is the right [side]; create darkness, this is the left side. Make peace, those are the angles of peace. And create evil, this is Samael. Angels of peace, ten groups [of them] serve the ten sefirot of the right [side]. Angels of destruction, ten degrees/ranks [of them] serve the ten sefirot of the left side. On them it is said: "And also this, opposite to this, Elokim made" (Ecclesiastes 7:14).