Proverbs 19:8

He who gains wisdom and good sense loves (preserves) his own soul; he who keeps understanding will find good and prosper.  

God said his people parish for lack of knowledge.  How much knowledge we have depends on the amount of study of the word we do.  If the goal is rock solid faith, then it will take time and commitment.  The value of the knowledge from the word will save us from many problems and mistakes.