"Wisdom is the principal thing; therefore get wisdom: and with all thy getting get understanding" (Proverbs 4:7).
As used in Proverbs, which is the book of divine wisdom, "knowledge" is awareness of facts. "Understanding" is comprehension of the meaning and interrelation of facts. Finally, "wisdom" is true character--the ability to use one's knowledge and understanding. True wisdom and true understanding are far more valuable than anything else in life. "For wisdom is better than rubies; and all the things that may be desired are not to be compared to it" (Proverbs 8:11).
Now, "The fear of the LORD is the beginning of knowledge," and "The fear of the LORD is the beginning of wisdom" (Proverbs 1:7; 9:10). One can acquire neither apart from Christ, "In whom are hid all the treasures of wisdom and knowledge" (Colossians 2:3). Further, wisdom and knowledge must come from the Holy Scriptures, for they are uniquely "profitable for doctrine, for reproof, for correction, for instruction in righteousness: That the man of God may be perfect" (II Timothy 3:16-17).
True wisdom does not come easily or automatically, however. "My son, if thou wilt receive my words, and hide my commandments with thee; So that thou incline thine ear unto wisdom, and apply thine heart to understanding; Yea, if thou criest after knowledge, and liftest up thy voice for understanding; If thou seekest her as silver, and searchest for her as for hid treasures; Then shalt thou understand the fear of the LORD, and find the knowledge of God. For the LORD giveth wisdom: out of His mouth cometh knowledge and understanding" (Proverbs 2:1-6).
One must receive and keep, listen and study, ask and pray, seek and search, both from the Lord and from His word. Then, He will grant knowledge and understanding and wisdom, which is the principal thing! HMM