Human experience and the processing of information are based on the representation of different hierarchical levels in the brain and the systems we are in. Here, it is determined which resources a person has or needs to successfully implement their plans. The B.E.L.L.A. principle offers you new options and helps you expand your scope of action in all areas of life. This training manual presents various models and change techniques in a clear and varied manner, promoting your self-determined and competent actions for a successful professional and personal life. Through practical examples and highly effective exercises, you will learn how to achieve your goals in your personal and professional daily life.