O demigods, fulfilling one's own interests is so important that one may even have to make a truce with one's enemies. For the sake of one's self-interest, one has to act according to the logic of the snake and the mouse.

A snake and a mouse were once caught in a basket. Now, since the mouse is food for the snake, this was a good opportunity for the snake. However, since both of them were caught in the basket, even if the snake ate the mouse, the snake would not be able to get out. Therefore, the snake thought it wise to make a truce with the mouse and ask the mouse to make a hole in the basket so that both of them could get out. The snake's intention was that after the mouse made the hole, the snake would eat the mouse and escape from the basket through the hole. This is called the logic of the snake and the mouse. (Srimad Bhagavatam-8:6:20--translation and purport).

Bhoga and tyāga. Bhoga means enjoyment, and tyāga means renunciation. So actually, in this world, some people are very much busy in the matter of bhoga, enjoying, the karmīs. And some people are very much engaged in the business of tyāga, renouncement. These two kinds of activities are going on. One is very, very busy for acquiring things for enjoy, sense enjoyment, and when he's dissatisfied, he cannot fully enjoy, neither he's satisfied, he says, brahma satyaṁ jagan mithyā, "This world is false. There is no need of this world. The grapes are sour." The same story. The jackal and the grapes. A jackal wanted to eat the grapes, and it jumped many times, but could not approach the grapes. So at last he satisfied himself that "There is no need of the grapes. It is sour." So this brahma satyaṁ jagan mithyā is like that. When one is fed up or tired of this world, he cannot enjoy it due to age or other circumstances, at that time, he says, jagan mithyā. Why jagan mithyā? If God is truth, then creation of God is also truth. Why it should be mithyā? But because he has no knowledge, sufficient knowledge of the Vedic instruction, īśāvāsyam idaṁ sarvam, pūrṇam adaḥ pūrṇāt pūrṇam udacyate (ISO-1), he does not know that creation of God is complete.
(Lecture on Srimad Bhagavatam-1:2:19--Vrindavana, 30th. October, 1972).

Whatever you have spoken about me is not false because unless and until one is aware of the Personality of Godhead, who is the ultimate truth beyond me, one is sure to be illusioned by observing my powerful activities.

"The frog in the well" logic illustrates that a frog residing in the atmosphere and boundary of a well cannot imagine the length and breadth of the gigantic ocean. Such a frog, when informed of the gigantic length and breadth of the ocean, first of all does not believe that there is such an ocean, and if someone assures him that factually there is such a thing, the frog then begins to measure it by imagination by means of pumping its belly as far as possible, with the result that the tiny abdomen of the frog bursts and the poor frog dies without any experience of the actual ocean. Similarly, the material scientists also want to challenge the inconceivable potency of the Lord by measuring Him with their froglike brains and their scientific achievements, but at the end they simply die unsuccessfully, like the frog.

Sometimes a materially powerful man is accepted as God or the incarnation of God without any knowledge of the factual God. Such a material assessment may be gradually extended, and the attempt may reach to the highest limit of Brahmājī, who is the topmost living being within the universe and has a duration of life unimaginable to the material scientist. As we get information from the most authentic book of knowledge, the Bhagavad-gītā (8.17), Brahmājī's one day and night is calculated to be some hundreds of thousands of years on our planet. This long duration of life may not be believed by "the frog in the well," but persons who have a realization of the truths mentioned in the Bhagavad-gītā accept the existence of a great personality who creates the variegatedness of the complete universe. It is understood from the revealed scriptures that the Brahmājī of this universe is younger than all the other Brahmās in charge of the many, many universes beyond this, but none of them can be equal to the Personality of Godhead.
(Srimad Bhagavatam-2:5:10--translation and purport).