Arcane Power

Arcane power is one of the three methods of channeling magic for the people of Thaerrathas.
All magic relates to channeling energy of Souls, primarily dealing with manipulating the Souls of the natural world around you, but it can also include your own Soul or the Souls of other creatures. Arcane power relates to controlling and guiding the Souls of the natural world. Warlocks, Wizards, and Sorcerers fall under practitioners of Arcane Power, additionally some subclasses that reference Wizards such as Arcane Trickster(Rogue) and Eldritch Knight(Fighter) could fall under this category.
This article isn't meant to constrain how player choice, but rather to make it clear how certain Spellcasters are seen by the world around them.
The manner in which the various Arcane spellcasters control the natural forces of the world does not vary from class to class, they all impose control over the spirits of the natural world, but they do so without communion. Arcane Spellcasters bend and twist the world to their whim. They are akin to a puppeteer, pulling on the unseen strings of the Spirits. The manner in which these spellcasters access their powers differ.
Wizards spend time studying the Arcane arts, inscribing spells into a Spellbook. Their way is the long way, but they know the arcane arts better than any other.
Sorcerers are mortal beings infused or born with the innate ability to utilize Arcane power. They usually do not know how they got their power or how it works. Sometimes it is a blessing from a Higher Being or it was something sleeping in their bloodline.
Warlocks form a pact with a Higher Being. Through this pact they are taught the secrets of Arcane power. A warlock might not understand why or how their powers work the way they do.

It should be noted that all Arcane Spellcasters are looked at with disdain by the peoples of Thaerrathas, excluding inhabitants of the Moons, because the Aberrations that roam the wastelands of Thaerrathas employ Arcane power. These Aberrations are what destroyed the old world and made much of Thaerrathas uninhabitable. The movements used to cast spells through Arcane power mirror the natural movements of these Aberrations and those aspiring to be Wizards will travel to the Aberrant Wastes to study said movements and develop a mastery over the Arcane. Many view the use of Arcane power as "using the weapons of the enemy" and put the motivations of Arcane spellcasters into question.