Human knowledge is limited. We need to use limited knowledge to understand the infinite world and the infinite development of the world. How to do? The solution is to rely on the transcendence of consciousness, that is to obtain universal laws by abstract method. We can assume universal laws universally applicable, and we can strategize at home and win from thousands of miles away. There are many abstract theories in every science. When philosophers attempt to use one theory to solve all problems and find the root cause of all problems, abstraction is needed even more.

Einstein said, the most incredible thing in the world is that the world is conceivable. Althought our subjective world can transcend the objective world, but the transcendence is subjective, flawed or wrong.

There are three major puzzles in philosophy: system puzzle, method puzzle and object puzzle. The system puzzle means that theories have beginning and end, how can we explain the infinite world and the infinite development of the world with a finite theory. The method puzzle means that the basic method of cognition is induction, but it can not reach complete induction, so it can not achieve necessity, and it must take a part for the whole. The object puzzle means that the object of knowledge should be the whole, but should it include the subject himself? To include himself is to repeat, not to include himself is not comprehensive.

How to solve the three puzzles? The way to solve the system puzzle is to rely on the transcendence of consciousness, that is to use abstract methods to obtain universal laws. However, when we abstract, we encounter the method puzzle. Because the premise of abstraction is induction, and induction can not achieve complete induction, so we can not achieve necessity, must take a part for the whole. So what do we do? There is no way, we have to take a part for the whole, we must take a part for the whole. Although it can lead difference between our understanding and the objective world, this is the only way we can understand the infinite world, this is the colored glasses we have to wear.

Thus the object puzzle arises, that is, the problem of whether the object of cognition contains the subject himself. It is generally believed that the object of knowledge is of course the whole, and of course the subject himself is included in the whole, which is not repeated and is comprehensive. This is not the case. Because the colored glasses of the abstract method make the difference between our knowledge and the objective world. The world we know is not the objective world outside the subjective world, but the objective world inside the subjective world. It is the objective world 2, not objective world 1. Therefore, the philosophical world outlook must place the objective world within the subjective world of a person himself and consider the subjective world to be greater than the objective world. This is what the object puzzle really means. In other words, we must understand the dialectical unity between the subjective world and the objective world, and we must take both consciousness and matter as the origins.