So that thou incline thine ear unto wisdom, and apply thine heart to understanding;

That thy ear may hearken to wisdom: Incline thy heart to know prudence:

To cause thine ear to attend to wisdom, Thou inclinest thy heart to understanding,

So that your ear gives attention to wisdom, and your heart is turned to knowledge;

So that thou make thine ear attend unto wisdom, And thy heart incline to discernment;

so that your ears may listen to wisdom, then bend your heart in order to know prudence.

So that thou incline thine ear unto wisdom, [and] apply (b) thine heart to understanding;
(b) If you give yourself to the true knowledge of God without hypocrisy.

So that thou incline thine ear unto Wisdom,.... Hearken to Wisdom, that is, Christ; or rather to the instruction of Wisdom, which is the Gospel; so called, because it is the produce of divine wisdom, what the wisdom of man could never have devised, and which it opposes; and in which there is a most glorious display of the wisdom of God, in the justification and salvation of his people by Christ, 1-Corinthians 2:6; and is worth listening unto with the greatest attention, which is what is designed by this expression;
and apply thine heart to understanding; to a spiritual and experimental understanding of the Gospel, and the truths of it: for an inclination of the ear, without an application of the heart, which signifies the intenseness of the mind, an earnest and hearty desire after knowledge, will signify nothing; a hypocrite may seemingly hear with great attention, and show much affection, and yet his heart be after the world and the things of it, Ezekiel 33:31; see Psalm 119:112.

Listen attentively and reflect seriously (Proverbs 1:24; Psalm 130:2).
understanding--right perception of truth.