"心灵的行为，其中它对简单观念施展其力量，主要有以下三点：1. 将几个简单观念结合成一个复合观念，从而形成所有复杂观念。2. 第二是将两个观念，不管是简单的还是复杂的，放在一起，并列摆放，以便同时查看它们，而不是将它们合并为一个，从而获得所有关系观念。3. 第三是将它们从其真实存在中伴随的所有其他观念中分离出来。这称为抽象，从而形成所有一般观念。"

Simplified Meaning:

This quote is explaining how our mind works with ideas in three important ways. First, our mind takes simple ideas and combines them to form more complex ideas. For example, when we think of a house, it’s a mix of simple ideas like walls, roof, doors, and windows coming together to make the whole picture. Second, our mind compares different ideas by placing them side by side. For instance, if you compare a dog and a cat, you look at both their similarities and differences without merging them into one new idea. Third, our mind separates certain aspects of ideas from others to focus on general concepts. For example, when we think of the concept of 'roundness,' we ignore other attributes like color or size, and focus only on the shape. This process helps us understand complex concepts and make sense of the world. By using these mental actions, we can improve problem-solving, creativity, and clear thinking in everyday life.