心理学必须是一门关于事实的科学，而非理论。
The mind is a flow of ever-changing experiences.
心灵是一个不断变化的经验流。
The elements of consciousness are the building blocks of mental life.
The study of the mind must be strictly empirical.
对心灵的研究必须严格经验化。
The psychologist must be a neutral observer.
心理学家必须是一个中立的观察者。
The mind is a constantly evolving process.
心灵是一个不断进化的过程。
The elements of consciousness are to be determined by systematic observation.
Psychology must be free from all metaphysical entanglements.
心理学必须摆脱一切形而上学的纠缠。
The mind is a complex of interacting elements.
心灵是一个相互作用元素的复合体。
The task of psychology is to discover the laws of mental structure.
心理学的任务是发现心理结构的规律。
The psychologist must study the mind without presuppositions.