I have read many articles related mental telepathy, like in book Think and Grow Rich, it says our brain broadcasts thoughts and receives others' thought through subconcious mind, please elaborate.
“Please elaborate” is an open-ended request that could encompass the whole spiritual path!
In Autobiography of a Yogi, the chapter with the amusing title, The Cauliflower Robbery, Paramhansa Yogananda summarizes this idea with brilliant simplicity. “Thoughts are universally and not individually rooted; a truth cannot be created, but only perceived. The erroneous thoughts of man result from imperfections in his discernment. The goal of yoga science is to calm the mind, that without distortion if may mirror the divine vision in the universe.”
The marvelous thing about spiritual truth is that applies to all levels of reality.
Napoleon Hill, in his book Think and Grow Rich, uses this truth to help people achieve (among other things) material wealth.
Yogananda was not indifferent to the need for money. He wrote Laws of Success and Scientific Healing Affirmations to help people magnetize whatever they might need. Swami Kriyananda has written an entire course called Success and Happiness Through Yoga Principles.
If you want to understand the Self-realization point of view on this subject, I would encourage you to look at those books and course.
The Masters help us on all levels. They know that experience is the best teacher. Eventually, through our own experience, we will be drawn to seek fulfillment on ever more expanded and subtle levels of reality. Finally we understand it is God Alone that we were seeking.
You say Think and Grow Rich talks about receiving thoughts through the subconscious mind. Self-realization teaches us to receive thoughts through the superconscious mind. You can imagine what a quantum shift this is in the nature of the thoughts we receive.
Just as a powerful radio can attune itself to every broadcasting bandwidth to receive a limitless variety of programs, in the same way, we can receive in our own consciousness Infinite Reality.
And just as the radio is not the creator of what passes through it, but merely the instrument, so it is with us. We are part of all that is. The purpose of our lives, and our deepest fulfillment comes when we attune, open, and allow that Infinity to flow.