The other side of the thought of Proverbs 25:2. What the mind of God is to the searchers after knowledge, that the heart of the true and wise king is to those who try to guess its counsels.

The heaven for height - The simple meaning of this is, the reasons of state, in reference to many acts of the executive government, can no more be fathomed by the common people, than the height of the heavens and the depth of the earth.

The heaven for height, and the earth for depth, and the heart of (e) kings [is] unsearchable.
(e) He shows that it is too hard for man to attain the reason of all the secret doings of the king, even when he is upright and does his duty.

The heaven for height, and the earth for depth,.... These are eminent for what are ascribed to them; nothing is higher than the heavens, nor anything deeper than the earth; the height of the heavens cannot be reached, and the centre of the earth cannot easily be got unto; the heavens above cannot be measured, and the foundation of the earth cannot be searched beneath; at least not by common persons, whatever may be done in their way by astronomers and geometricians. And thus, as the heavens and the earth are immeasurable, Jeremiah 31:37; so
the heart of kings is unsearchable; especially such an one as Solomon was, who had largeness of heart as the sand on the seashore: and this must be understood of such who have the art of governing; for some are so weak in their conduct, and so much expose themselves, that it is easy to see what is in their hearts, and what are the springs of their actions. Wise princes lay their schemes deep, and conceal their designs, and keep their reasons of state secret, so that it is not an easy thing to penetrate into their councils and views: for this does not so much respect the multitude of business they have upon their hearts and hands, as Jarchi and others understand it, as the privacy and secrecy in which they are managed, and the reasons of which are kept from common persons, Who therefore are not proper judges of them; and who yet will often take upon them to censure and condemn, when they are ignorant of the true cause of such conduct.

Ye wisely keeping state secrets, which to common men are as inaccessible heights and depths.

3 The heavens in height, and the earth in depth,
And the heart of kings are unsearchable.
This is a proverb in the priamel-form, vid., p. 13. The praeambulum consists of three subjects to which the predicate אין חקר [= no searching out] is common. "As it is impossible to search through the heavens and through the earth, so it is also impossible to search the hearts of common men (like the earth), and the hearts of kings (like the heavens)" (Fleischer). The meaning, however, is simple. Three unsearchable things are placed together: the heavens, with reference to their height, stretching into the impenetrable distance; the earth, in respect to its depth, reaching down into the immeasurable abyss; and the heart of kings - it is this third thing which the proverb particularly aims at - which in themselves, and especially with that which goes on in their depths, are impenetrable and unsearchable. The proverb is a warning against the delusion of being flattered by the favour of the king, which may, before one thinks of it, be withdrawn or changed even into the contrary; and a counsel to one to take heed to his words and acts, and to see to it that he is influenced by higher motives than by the fallacious calculation of the impression on the view and disposition of the king. The ל in both cases is the expression of the reverence, as e.g., at 2-Chronicles 9:22. וארץ, not = והארץ, but like Isaiah 26:19; Isaiah 65:17, for וארץ, which generally occurs only in the st. constr.

The heart - Though wise kings will search out other men, yet their inward thoughts and purposes are hardly discoverable.