Question: How to find the real knowledge ?
Answer: Knowledge of this world, acquired from sources within it, will always be imperfect and limited.
vidyāṁ cāvidyāṁ ca yas / tad vedobhayaṁ saha||
avidyayā mṛtyuṁ tīrtvā / vidyayāmṛtam aśnute||
"Only one who can learn the process of nescience and that of transcendental knowledge side by side can transcend the influence of repeated birth and death and enjoy the full blessings of immortality."
—Sri Ishopanishad, Mantra 11
People do not understand what immortality is. Because they have no knowledge of the subject, they think it is a vague idea.
Nowadays people are being educated all over the world for advancement of knowledge. Knowledge is meant for the human being, not for the cats and dogs. Therefore, for human being, there are so many universities, schools, colleges, institutions, laws.
To advance in knowledge is to understand "Who am I?" If I do not know who am I, then what is the meaning of my advancement of knowledge? Generally, despite so many universities all over the world, people are going on in the concept of this body, "I am this body." "I am Indian, " "I am American, " "I am Hindu, " "I am Muslim." So everyone is identifying himself with this material body. Then where is the advancement of knowledge?
Bhagavad Gita 13.3 says
yat taj jñānaṁ mataṁ mama.
The kṣetra, this body, and the owner of the body... I am not this body, I am the owner of this body. This is jñānam.
There are so many things we do not know, and can never know, even by our modern experimental knowledge. If you want real knowledge, you must go to the source of knowledge: the Vedas.
Veda means "knowledge." There are 108 Vedic Upanishads, out of which nine are very important. The Bhagavad-gita is also known as the Gitopanisad. It is the essence of the Vedic knowledge and one of the most important Upanisads in Vedic literature.