In order for God's wisdom to make sense to you, you must first have a relationship with Him through Christ.  This is demonstrated by the first two words of Proverbs 1:8, "My Son".

The fear of the Lord is not a carnal fear as we would typically think of it; but rather is having awe and respect for God.

God's complete will is sometimes not for us to know at any given time, but the vast majority of His will is revealed to us through His Word.