Behold, God is great, and we know him not - That is, we cannot fully comprehend him; see the notes at Job 11:7-9.

Neither can the number of his years be searched out - That is, he is eternal. The object of what is said here is to impress the mind with a sense of the greatness of God, and with the folly of attempting fully to comprehend the reason of what he does. Man is of a few days, and it is presumption in him to sit in judgment on the doings of one who is from eternity. We may here remark that the doctrine that there is an Eternal Being presiding over the universe, was a doctrine fully held by the speakers in this book - a doctrine far in advance of all that philosophy ever taught, and which was unknown for ages in the lands on which the light of revelation never shone.

Job 36:26 Parallel Commentaries

Whether the Judicial Power Corresponds to Voluntary Poverty?
Objection 1: It would seem that the judicial power does not correspond to voluntary poverty. For it was promised to none but the twelve apostles (Mat. 19:28): "You shall sit on twelve seats, judging," etc. Since then those who are voluntarily poor are not all apostles, it would seem that the judicial power is not competent to all. Objection 2: Further, to offer sacrifice to God of one's own body is more than to do so of outward things. Now martyrs and also virgins offer sacrifice to God of their …
Saint Thomas Aquinas—Summa Theologica

Job
The book of Job is one of the great masterpieces of the world's literature, if not indeed the greatest. The author was a man of superb literary genius, and of rich, daring, and original mind. The problem with which he deals is one of inexhaustible interest, and his treatment of it is everywhere characterized by a psychological insight, an intellectual courage, and a fertility and brilliance of resource which are nothing less than astonishing. Opinion has been divided as to how the book should be …
John Edgar McFadyen—Introduction to the Old Testament