Solomon wrote 3,000 proverbs late in life (1 Kings 4:32). The book warns against the very dangers Solomon tasted: lust for women, desire for riches, etc. He had 1,000 wives, he loved horses, and he was probably the richest man in the world. He had wisdom but not along the lines that he discussed in the Book of Proverbs. Later he saw that all is vanity, that the acquisition of material things is meaningless if not predicated upon the fear (reverence) of the Lord and obedience to the knowledge acquired. God ultimately blessed Solomon in that when Solomon came to his senses, the advice he could give was a form of repentance. The same principle applies to Elihu, who wrote the Book of Job based on his contrition for his lack of wisdom in rebuking Job. In both cases the Lord blessed the writing by including it as part of Holy Writ. Hence Solomon gives sound advice in the Book of Proverbs. Some of the advice is along literal lines, and some advice is spiritual. However, most of the knowledge and understanding are pragmatic (practical).