“One can have no smaller or greater mastery than mastery of oneself.”
“The mastery of nature is vainly believed to be an adequate substitute for self mastery.”
“Mastery of language affords one remarkable opportunities.”
“I had some ambition. I meant everything to be different with me. I thought I had more strength and mastery. But the most terrible obstacles are such as nobody can see except oneself.”
“The ability to think for one's self depends upon one's mastery of the language.”
“Mastery in Servitude”