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Easy Journey to Other Planets
Therefore, we think that the theory maintaining that the material and anti-material worlds may clash, resulting in the annihilation of both worlds, is correct only within the context of the scientists' limited definition of anti-matter. The  G\bar{t}\bar{a}  explains the nature of the anti-material particle, which can never be annihilated:
The fine and immeasurable anti-material particle is always indestructible, permanent and eternal. After a certain period, it is liberated from material bondage by annihilation of the material particle. This same principle also operates in the case of the material and anti-material worlds. No one should fear the annihilation of the anti-material particle, for it survives the annihilation of material worlds.
(Bg. 2.21-22)
Everything that is created is annihilated at a certain stage. Both the material body and the material world are created, and they are therefore subject to annihilation. The anti-material particle, however, is never created, and consequently it is never annihilated. This also is corroborated in the  G\bar{t}\bar{a} :
The anti-material particle, which is the vital force, is never born or created. It exists eternally. It has neither birth dates nor death dates. It is neither repeatedly created nor repeatedly destroyed. It is eternally existing, and therefore
Anti-material Worlds
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it is the oldest of the old, and yet it is always fresh and new. Although the material particle is annihilated, the anti-material particle is never affected.
(Bg. 2.20)
The principle is also applicable to the anti-material universe as well as to the anti-material particle. When the material universe is annihilated, the anti-material universe exists in all circumstances. This will be explained in more detail later.
The scientist may also learn the following from the  G\bar{t}\bar{a} :
The learned man who knows perfectly well that the anti-material particle is indestructible knows that it cannot be annihilated by any means.
(Bg. 2.30)
The atomic scientist may consider annihilating the material world by nuclear weapons, but his weapons cannot destroy the anti-material world. The anti-material particle is more clearly explained in the following lines:
It is neither cut into pieces by any material weapon, nor is it burnt by fire. Nor is it moistened by water, nor withered, nor dried up, nor evaporated in the air. It is indivisible, nonflammable, and insoluble. Because it is eternal, it can enter into and leave any sort of body. Being steady by constitution, its qualities are always