Leadership is not magnetic personality - that can just as well be a glib tongue. It is not "making friends and influencing people" - that is flattery. Leadership is lifting a person's vision to high sights, the raising of a person's performance to a higher standard, the building of a personality beyond its normal limitations.
There is no other way of guarding oneself against flattery than by letting men understand that they will not offend you by speaking the truth; but when everyone can tell you the truth, you lose their respect.
Trees are the best monuments that a man can erect to his own memory. They speak his praises without flattery, and they are blessings to children yet unborn.
Men have various subjects in which they may excel, or at least would be thought to excel, and though they love to hear justice done to them where they know they excel, yet they are most and best flattered upon those points where they wish to excel and yet are doubtful whether they do or not.
A man sufficiently gifted with humor is in small danger of succumbing to flattering delusions about himself, because he cannot help perceiving what a pompous ass he would become if he did.