You can follow the recently created man-made scriptures, which have limited knowledge and do not describe God. Or you can follow the eternal Vedic scriptures, which have vast knowledge and completely describe God. The choice is yours.
Lord Krishna gave the Vedic knowledge to Brahma, the first living being created in the universe, at the beginning of each cycle. In the current cycle, this was 155.522 trillion years ago. Thus the Vedic knowledge is eternal and comes directly from God (Lord Krishna).
“I am telling you this ancient science of linking with the Supreme [Yoga], because you are My friend and devotee. Therefore you can understand the mystery of this highest science.”(Lord Krishna, Bhagavad-Gita 4.3)
The Vedic knowledge can be understood by those who are open minded and willing to accept the truth.
“My devotees become righteous, attain lasting peace, and never perish. “Lord Krishna(Bhagavad-Gita 9.31)
The genuine devotees of Lord Krishna are truthful, charitable, and friendly to all living beings. When the devotees of Lord Krishna decrease in the world, there will be degradation and humans will become killers, haters, and ignorant.
“There is nothing superior to Me. Everything is resting upon me. Just like pearls are strung on a thread.”(Lord Krishna, Bhagavad-Gita 7.7)
Those who are willing to accept the truth will realize that Lord Krishna is the one true God, because He has appeared and proved Himself to be the Supreme, not just once but millions of times.
“This is the purest knowledge, the king of education, the king of the most confidential knowledge. It is the highest knowledge, most righteous, and everlasting.”(Lord Krishna, Bhagavad-Gita 9.2)
The Bhagavad-Gita provides the best spiritual education and those who follow it will become righteous in this life and benefit eternally by being transferred to the spiritual creation at the end of this short life. All other so-called knowledge may bring temporary benefits, but is completely useless at the time of death. We cannot take our degrees in Medicine/Engineering/Law with us when we die.