Classes
It can be difficult to think of what a class is conceptually. This short hand list can help how you think of the class in a reductive way. Note; you can play a class in any way you see fit. This list is just a generalization.
Arcane
Wizards get their power from hard work and study.
Sorcerers get their power from inherent ability that is difficult to control.
Warlocks get their power from an external source, however that external source does not control their power (necessarily).
Discipline
Artificers get their power from honing their mind.
Rogues get their power from honing their skills.
Bards get their power from honing their spirit.
Fighters get their power from honing their body.
Religious
Clerics get their power from an external manifestation of beliefs that typically do control their power.
Monks get their power from internalizing a belief system.
Paladins get their power from exerting their beliefs outward.
WildÂ
Rangers bring order to the wild.
Barbarians bring the wild to the order.
Druids find harmony in the balance.