Job 36:26

Behold, God [is] great
In his power and might, in his wisdom and knowledge, in his truth and faithfulness, in his love, grace, and mercy, and that to admiration; and it is worthy of notice and attention, which the word "behold", prefixed hereunto, is expressive of: or is "much" or "many" ^F6; as he is in his persons: for though his essence is one, his persons are more, they are three, Father, Son, and Spirit; in his perfections, of which there is a fulness; in his thoughts, counsels, purposes? and decrees, which respect other persons and things; in his works of creation, providence, and grace, and in the blessings of his goodness, which are so many as not to be reckoned up;

and we know [him] not;
God is to be known by the works of creation, and even by the very Heathen; though such is their inattention to them, that they are said not to know God; yea, even the wisest among them, by all their wisdom, knew not God, ( 1 Corinthians 1:21 ) ; for though they might know there was a God, they knew not who and what he was. God is known by his word among those who are favoured with a divine revelation of him, and especially by true believers in Christ, who know God in Christ, whom to know is life eternal; and yet these know but in part, there is no finding out the Almighty to perfection; God is not known clearly, fully, and perfectly, by any: or "we know [it] not"; the greatness of God; he is great, but we know not how great he is; his greatness is beyond all conception and expression;

neither can the number of his years be searched out;
years are ascribed to God, after the manner of men, otherwise, properly speaking, they are not applicable to him; by which time is measured, and which belongs not to the eternal God; however, the number of his years in an eternity past, and of those to come, cannot be searched out and reckoned up: it requires no great skill in arithmetic to reckon up the years of the oldest man that ever lived; yea, the months, the days, the hours, and minutes, of his life may be counted; but the years of the Most High cannot; this is a phrase expressive of the eternity of him which is, and was, and is to come, and who from everlasting to everlasting is God. He was before the world was, as the creation of it out of nothing shows. Jehovah the Father had a Son, and he loved him before the foundation of the world, and all his people in him; he made an everlasting choice of them in him, before the world began; he made an everlasting covenant with them in him, and gave them grace in him as early as that; he set him up as Mediator from everlasting, from the beginning, or ever the earth was; and will be the everlasting and unchangeable portion of his people to all eternity. Cocceius thinks that these words are expressive of the constant love of God to the church, and the continuance of his kingdom in it; and of his most fixed purpose of love to men, and indefatigable care of them.