Thomas Aquinas

So that Job does not ask the reason why he did not speak before he says, "Behold, I have opened my mouth," as if to say: Before when I was silent, I had kept my mouth closed out of reverence for my elders, since now they are deficient, necessity compels me to speak. So he says, "my tongue in my mouth will speak," as if to say: I will not follow what others say, but I will speak my own ideas.

Commentary on Job ↗