“Most people overestimate others' talents and underestimate their own.”
“Most people overestimate what they can do in one year and underestimate what they can do in ten years.”
“A leader would think that most people overestimate what they can do in a year and underestimate what they can do in ten years.”
“Never underestimate your power to change yourself; never overestimate your power to change others.”
“It is as much of a mistake to underestimate yourself as to overestimate yourself.”
“Change is hard because people overestimate the value of what they have---and underestimate the value of what they may gain by giving that up.”