This is a statement about Farage’s private motivation, which cannot be directly verified from public evidence. Public biographies do show that he had a prior commodities-trading career and became a founding member of UKIP in 1993, which is consistent with claiming he was driven by conviction rather than a desire to be a career politician, but those records do not prove his subjective reason. Sources: UK Parliament, Nigel Farage parliamentary career; National Portrait Gallery, Nigel Farage biography; Nigel Farage official about page. (members.parliament.uk)