If you actually require perfect knowledge, then we have to accept knowledge this, like this way. It is called avaroha-panthā. Avaroha-panthā means a descendence, or deductive process. So our Kṛṣṇa consciousness movement, we claim that we have got perfect knowledge of everything because we are taking knowledge from the perfect person—Kṛṣṇa. Evaṁ paramparā-prāptam imaṁ rājarṣayo viduḥ (BG 4.2). And that is the real process. If you simply speculate to arrive at the conclusion, inductive process . . . just like if you want to study whether man is mortal or immortal, there are two processes. Deductive process, you take the idea from superior person that man is mortal. If you accept, then your knowledge is perfect. But if you want to approach the knowledge by inductive process, by studying each man, whether he is mortal or immortal, you may study thousand, two thousand, five thousand, but you cannot study all the men. Therefore your conclusion remains always defective. You cannot do that. Therefore the best process is knowledge is to receive from the person who is authorized. Actually, you do that. We go to a school, we go to college, to receive knowledge from the superior person. That is our process. That is perfect knowledge. You cannot manufacture knowledge.
Therefore real knowledge of everything can be had from the Bhagavad-gītā. If you study it nicely, it is very easier and perfect.