The Highest Science is in the Bhagavad-Gita (pdf file)
God is not created nor can He be destroyed. He has no beginning, and no end. God is eternal.
“He who knows Me as the unborn, as the beginningless, as the Supreme Lord of all the worlds – he only, undeluded among men, is freed from all sins.” (Lord Krishna, Bhagavad-Gita 10.3)
This life is like one drop in the ocean of time, and the ocean is infinite. Time is eternal.
“Time I am.” (Lord Krishna, Bhagavad-Gita 11.32)
If we go back zillion to the power of zillion years back. You existed. If we go forward zillion to the power of zillion years in the future, you will exist. You are eternal.
“Never was there a time when I did not exist, nor you, nor all these kings; nor in the future shall any of us cease to be.” (Lord Krishna, Bhagavad-Gita 2.12)
The essential substance of all objects is matter. We can change the matter from one form to another, but we cannot create new matter nor destroy matter. Matter is eternal.
“Material nature and the living entities should be understood to be beginningless. Their transformations and the modes of matter are products of material nature.” (Lord Krishna, Bhagavad-Gita 13.20)
Time and matter is eternal, because these are energies of the eternal God. The living entities (souls) are eternal, because these are parts of the eternal God.
“My Self is the very source of creation.” (Lord Krishna, Bhagavad-Gita 9.5)
“The living entities in this conditioned world are My eternal, fragmental parts. ” (Lord Krishna, Bhagavad-Gita 15.7)
One will not find any information like the above in any non-Vedic scriptures. This is because, only God can give this information and He give it in a scripture directly spoken by Him, the Bhagavad-Gita.