From LSWiki

Class: Esoteric Skills
Attribute: Willpower
Pedagogy: Procedural
Practitioner Term: Practitioner of Centering

The mental discipline of awareness of the facets of one's spirit and of bringing them into coherent harmony. The resolution of inner conflict frees one's energies for other purposes, increasing the amount of spiritual power one may draw upon.

Trainers

Trainers: 
Nexus: Goth
R'lyeh : Ithnagl wanders
Temple of Discordia: Erasmus
Veteran: wanders
Association required:
Agnihotri: Riga
Deep Ones: Dagon
Deep Ones: Mother Hydra
Losthaven Guard: Berek
Ollin Tonatiuh: Nezcaluca
Ygellethites: Ashyire
Ygellethites: Saruezzta
Guild required:
Aligned: Taiji
Coven: Esme Wanders
Coven: Halea
Coven: Lynda Xenetha
Devonshire Clerics: Thromdan
Elflords: Celeborn
Ordo Ignis Aeternis: Flizera
Ordo Ignis Aeternis: Pierce
Ordo Maleficus: Antonina
Ordo Zephyrius Mutatoris: Aerina
Ringwielders: Merethus
Zetesai: Linp
Temple of Discordia: Malaclypse the Younger LDDPOEE
Quest required