'Understand' in the Bible

saying, Go thou unto this people, and say, By hearing ye shall hear, and shall in no wise understand; And seeing ye shall see, and shall in no wise perceive:

For this people's heart is waxed gross, And their ears are dull of hearing, And their eyes they have closed; Lest, haply they should perceive with their eyes, And hear with their ears, And understand with their heart, And should turn again, And I should heal them.