someone please clarify on House , planet in a house and Dispositor of house . I saw the class

○ Karak – quality
○ Event – decoded by house
○ Manager of house – house lord
ex – 7hl exalted but only malefics in 7h no benefic aspect , Then no marriage, If person will get divorce or not it will be decided by 7hl
And quality of marriage , By karak of marriage= venus

this is what I understood , someone please elaborate on this foundational udnerstanding