This quest is not available in game.
Speak to Tiza Battleforge in Ironforge.
In all things, a paladin must reflect the Light which supplements our strength. To strive to be divine for one of our kind does not mean we strive for godhood--we strive to be good in all actions.
Although called upon to smite evil in these harsh times, you must always remember that it's aiding others that will truly set you apart from the citizens of Azeroth. Compassion, patience, bravery--these things mean as much to a paladin as strength in battle.
Know this well, and never forget it.