Man cannot exist in our material world without some knowledge about material nature’s laws, and what is useful and harmful for him in the world and in people around him. Without knowing these laws we would immediately harm ourselves and perish.
The person should reveal two aspects of the spiritual:
1. It should not be imaginary; and
2. Its attainment should leave no doubt.
Those who are guided by the mind of the physical body do not aspire to attain the Creator and are totally indifferent to the knowledge of other people. The mind obliges them to do what their desire feels because it is always a derivative of desire.