Humility is becoming a lost art, but it's not difficult to p... - Harvey Mackay

"Don't water your weeds"

"Ego stops you from getting things done and getting people to work with you. That's why I firmly believe that ego and success are not compatible."

"Don't fall in love with your wit. Your cleverly turned phrase may not, as you hope, show off how much gray matter you have, especially if the phrase is at someone else's expense."

"I've known entrepreneurs who were not great salespeople, or didn't know how to code, or were not particularly charismatic leaders. But I don't know of any entrepreneurs who have achieved any level of success without persistence and determination."