No man, who is not inflamed by vain-glory into enthusiasm, can flatter himself that his single, unsupported, desultory, unsyste-matic endeavours are of power to defeat the subtle designs and united Cabals of ambitious citizens.
 Edmund Burke, Thoughts on the Cause of the Present Discontents (1770). copy citation

Context

“it is evidently impossible that they can act a public part with uniformity, perseverance, or efficacy. In a connexion, the most in considerable man, by adding to the weight of the whole, has his value, and his use; out of it, the greatest talents are wholly unserviceable to the publick. No man, who is not inflamed by vain-glory into enthusiasm, can flatter himself that his single, unsupported, desultory, unsyste-matic endeavours are of power to defeat the subtle designs and united Cabals of ambitious citizens. When bad men combine, the good must associate; else they will fall, one by one, an unpitied sacrifice in a contemptible struggle. It is not enough, in a situation of trust in the commonwealth, that a man means well to his country;” source