What is 'Doctrine' and does it matter?

The word doctrine comes from a Latin word, doctrina, which means, “that which is taught.”  and it refers to the Christian teachings on Scripture, God, man, Christ, salvation, church, and the end of all things. Simply put, doctrines are organized teachings by their subjects.  The Doctrine of something is simply the organized explanation of what is taught about that something.  When it comes to Jesus, who Jesus is and what he did, is simply the doctrine of Christ.