I believe there are three types of knowledge one must grow
Professional Knowledge. The most obvious one. Access to studies and formations to become a professional of some sort is, fortunately, slowly becoming the standard world wide. Our problem is that we believe this knowledge to be enough. Wrong.
Personal Knowledge. Willingness to get to know oneself is every day more common in western society (influenced by the oriental one, pushed by globalisation). This is all about unmasking our egos, understanding our behaviours, and training our weaknesses.
Cultural Knowledge. Slowly but steady, the evolution of technology is blurring the boundaries between countries. Both in business and in private life, the foreign presence is growing. Not paying interest to other’s history, religions, customs and manners is a big mistake.