Because [[There are no bad parts]] and [[Self welcomes all]]. Unwelcomed [[Parts]] won't open up, cooperate, or heal. Conversely, welcomed parts are happy to follow the lead of [[Self]] if they're treated with respect and they feel its safe to let go of their roles and burdens. Welcoming parts is also a lot more light and fun: [[Awakening and healing is easier when it's fun]].