Each underestimates her own power and overestimates the other's
It is human nature to overestimate the thing you've never had.
Sam: “You—you greatly overestimate my self-control.” Grace: “I’m not looking for self-control.
High-toned humanitarians constantly overestimate the sufferings of those they sympathize with.
One is apt to overestimate beauty when it is rare
To measure up to all that is demanded of him, a man must overestimate his capacities