heart to know wisdom , 21_ECC_01:17 And I gave my heart to know wisdom, and to know madness and folly: I perceived that this also is vexation of spirit. , heart to know wisdom , 21_ECC_08:16 When I applied mine heart to know wisdom, and to see the business that is done upon the earth: (for also [there is that] neither day nor night seeth sleep with his eyes:) ,