Thou must be emptied of that wherewith thou art full, that thou mayest be filled with that whereof thou art empty.
— Saint Augustine

whereof one cannot speak, thereof one must be silent.
Ludwig Wittgenstein whereof quote

Whereof whats past is prologue, what to comeIn yours and my discharge.
— William Shakespeare

There was a castle called Doubting Castle, the owner whereof was Giant Despair.
— John Bunyan

Action hangs, as it were, dissolved in speech, in thoughts whereof speech is the shadow; and precipitates itself therefrom. The kind of speech in a man betokens the kind of action you will get from him.
— whereof quotation by Thomas Carlyle