Until we understand who God is and develop a reverential fear of Him, we cannot have true wisdom.
Joshua understood healthy and proper fear of God: Joshua 24:14-15 says, "Now fear the LORD and serve him with all faithfulness. Throw away the gods your forefathers worshiped beyond the River and in Egypt, and serve the LORD. But if serving the LORD seems undesirable to you, then choose for yourselves this day whom you will serve, whether the gods your forefathers served beyond the River, or the gods of the Amorites, in whose land you are living. But as for me and my household, we will serve the LORD." Proverbs 1:7 declares, “The fear of the LORD is the beginning of knowledge.” True wisdom comes only from understanding who God is and that He is holy, just, and righteous. For the unbeliever fear is the fear of death, judgement and eternal separation from God. Hebrews 10:3 tells us, “It’s a fearful thing to fall into the hands of the living God.” The beauty of fearful respect of God is that it leads us in wisdom to worship the only one that is worthy. For the believer, the fear of God is something much different. The believer's fear is reverence, honor, awe and esteem for God.