In this video, Lane Chaplin convincingly explains the God-given mandate to dig into theology. He also illustrates the practical importance.

Does doctrine divide us? Sadly, sometimes it does – or rather, sometime Christians do divide over doctrine.  But doctrine also unites. It unites us with other believers, both of our own day and of ages past.  And, when properly discerned, doctrine unites our minds with the mind of God.  I would say that is worth a little work.