Besides quests being run by immortals there are so called autoquests. Certain mobs, rooms and objects may carry special procedures that are able to run smaller or larger quests for you. Those may be open for all players or level-, alignment- etc. dependent. Don't be afraid if a mob asks you to do him a favour :) If you like to check out some of these quests try the actor and rusty in Freyburg. To see other procedures at work try the beggars in Freyburg or the Avatar plate in the Cathedral. Note that the procedures may not be triggered all the time!