2005, Irvin D. Yalom, The Theory and Practice of Group Psychotherapy, Knowingly or unknowingly, every therapist assumes that each client possesses the capacity to change through willful choice.
Stubborn.
1893, Edwin Caskoden, Mary had taken the whim into her willful head, and Jane could not dissuade her.
1995, Francine Rivers, As Sure as the Dawn, "He's as willful as you," Rizpah said. "If you let him hurt himself again, so help me, I'll — "
2007, Roger K. Thomas, Kinshu: Autumn Brocade‎, You had a pampered upbringing, and possessed enough of a willful streak that I wanted to slap you at times