The thought system that dominates our world is laced with selfish values, and relinquishing those values is a lot easier said than done. The journey to a pure heart can be highly disorientating. For years we may have worked for money, power and prestige. Now all of a sudden we've learned that those are just the values of a dying world.
Wisdom ceases to be wisdom when it becomes too proud to weep, too grave to laugh, and too selfish to seek other than itself.