The Teacher has already made it clear that human wisdom is no pathway to immortality, meaning or even comprehensive understanding of our world. But he can't the shake the notion that it's better than other limited therapies for survival amidst the absurdity of life. This is because in all his criticisms of wisdom's feebleness, he detected a truer wisdom that seemed capable of deliverance - this is the wisdom embodied by Jesus, the wisdom of the cross.