(Krishna laughs upon seeing Paundraka imitating His posture and dress—click to enlarge)
Prabhupāda: "How I shall live? What I shall eat? Where I shall live? Where I'll, I'll have my shelter...?" We are always perplexed with all these fearfulness. Why? Because we have forgotten that there is one who is giving me all protection. We are, we have become so foolish that..., that the lower animals than the human being, they have no economic problem. They are freely living. In the morning they do not care where they shall eat. But there is eating. No animal, no bird, is dying of starvation. Have you seen any animal or any bird has died out of starvation? And who is providing him? So they have no economic problem. The only this foolish, advanced, civilized man, under the name of so-called misusing the intelligence, which was given to him for realization of God, misusing for sense gratification, and therefore they are troubled. That is the whole problem. The world's problem is due to this forgetfulness. Īśād apetasya viparyayo 'smṛtiḥ. They have forgotten the protection of Kṛṣṇa, God. They think that "By this adjustment, we shall be able to protect." Nonsense. It is not possible. Can you protect yourself from death? No. Then what is your protection?
So this is the formula: bhayaṁ dvitīyābhiniveśataḥ syāt. Dvitīya means that a, a secondary existence beyond God which is, in Bible, it is said, Satan and God. So this satanic mentality has made them under the control of material nature. Satanic mentality. What is that satanic mentality? That "I want to be God." Always thinking falsely, "I am God," or "Independent," "I can do anything, everything," "Whatever I survey, I am the lord of whatever I survey." These foolish things are going on.
So this is very nicely explained, and reference is given by Lord Caitanya that our whole difficulty, problems, anxiety... A similar verse is in Bhāgavata, another place, sadā samudvigna-dhiyām asad-grahāt (SB 7.5.5). Asad-grahāt. Asat means nonpermanent, which will, we shall not exist. Due to our absorption in that sight, asat, this matter... Just like this body: it will not exist. So giving too much stress on the bodily concept of life, they are sadā samudvigna-dhiyā, they are always full of anxiety. This is the cause. The foolish people, they do not know. Still, they are very much proud of education. Here is the cause, that because we have given too much stress on this false conception of life, therefore we are always full of anxiety. And as soon as I understand that "I am pure spirit soul, part and parcel of Kṛṣṇa, the Supreme Lord. He is giving me all protection, and my duty is to love and serve Him," then I am free. At once I am free. The simple formula.
(Srila Prabhupada Lecture, New York, November 24, 1966)