Sentence:  ... I not only recognised my natural body from the mere aura and effulgence of certain of the powers that made up my spirit, but managed to compound a drug by which these powers should be <WSD>dethroned</WSD> from their supremacy, and a second form and countenance substituted, none the less natural to me because they were the expression, and bore the stamp of lower elements in my soul. 
Meaning of the word marked with <WSD> tags:  To remove (something) from a position of power or paramount importance.