I applied mine heart to know, and to search, and to seek out wisdom,.... Or, "I and my heart turned about" ; took a circuit, a tour throughout the whole compass of things; looked into every corner, and went through the circle of knowledge, in order to search and find out what true wisdom is; which is no other than Christ, and a spiritual knowledge of him; a variety of words is used to express his eager desire after wisdom, and the diligent search he made, from which he was not discouraged by the difficulties he met with; see Ec 1:13;and the reason [of things]; either in nature or providence: or the estimation of them; the excellency of them, how much they are to be accounted of, esteemed, and valued; as Christ, the Wisdom of God, and all things relating to him, should;and to know the wickedness of folly, even of foolishness [and] madness; the exceeding sinfulness of sin, the folly and madness that are in it; sin is the effect of folly, and the excess of it, and a spiritual madness; it is true of all sin in general, but especially of the sin of uncleanness, which Solomon seems to have in view by what follows; see Ec 1:17; and may chiefly intend the wickedness of his own folly, and the foolishness of his own madness.
yblw yna ytwbo "circuivi ego et cor meum", Pagninus, Montanus, Mercerus, Gejerus.