" More than our physical environments, we are perhaps most influenced by the relationships and company we keep. Contrary to what most of us prefer to believe—that we are independent individuals who are impervious to external pressures and make decisions on our own—we are often significantly influenced by the people around us in the decisions we make. Our social circle informs us as to what is acceptable, and can either support us or hold us back. Be selective when it comes to the people you include in your social network. While you can’t choose your family, you can decide how much time you spend with them. Choose your friends wisely. Behavior is contagious, so associating with driven, goal-oriented, and self-disciplined individuals will likely influence you to nurture those qualities in yourself as well. "

― Peter Hollins , The Science of Self-Discipline: The Willpower, Mental Toughness, and Self-Control to Resist Temptation and Achieve Your Goals