And it is a fact that dhyana is 'By You', 'Of You' and 'In You'- RAMANA MAHARSHI :

You know that you are!

And it is a fact that dhyana is 'By You', 'Of You' and 'In You'.

It must go on where you are. It cannot be outside of you. So you are the center of dhyana and that is called the Heart. A location is given to it only with reference to the body.

Where are you? You are not out of the body but pervade it. Still you admit a center where from all your thoughts start and wherein they subside.
You are there even when your limbs would be amputated; and with defective senses you are still present.

So a center of consciousness must be admitted. That is called the Heart.
Heart is only another name for the Self.

Doubts arise only when you identify it with something tangible and physical.

Heart is no conception, no object for meditation. It is the Self and the seat of meditation.

Q: But the mind slips away.

Bhagavan: Be it so. Do not think of it. When you recollect, bring it back and turn it inward. That is enough.
No on succeeds without efforts. Mind control is not one’s birthright.
The successful few owe their success to their perseverance.

You are already aware of yourself. Seek it out and it will expand to infinity.
Be that.

~RAMANA MAHARSHI