You may go on reading any number of books on Meditation. They can only tell you ‘Realize the Self’. The Self cannot be found in books. You have to find it for yourself in yourself.

Concentration is not thinking of one thing. On the contrary, it is excluding all thoughts, since all thoughts obstruct the sense of one's true being. All efforts are to be directed simply to removing the veil of ignorance. Concentrating the mind solely on the Self will lead to happiness or bliss. Drawing in the thoughts, restraining them and preventing them from straying outwards is called detachment (vairagya). Fixing them in the Self is spiritual practice (sadhana). Concentrating on the heart is the same as concentrating on the Self. Heart is another name for Self.

The Self alone exists. When you try to trace the ego, which is the basis of the perception of the world and everything else, you find the ego does not exist at all and neither does all this creation that you see.

By whatever path you go, you will have to lose yourself in the one. Surrender is complete only when you reach the stage `Thou art all' and `Thy will be done'.

Apart from thoughts, there is no independent entity called the world. In deep sleep there are no thoughts, and there is no world. In the states of waking and dream, there are thoughts, and there is a world also. Just as the spider emits the thread (of the web) out of itself and again withdraws it into itself, likewise the mind projects the world out of itself and again resolves it into itself.

Grace is ever present. All that is necessary is that you surrender to it.

To ask the mind to kill itself is like making the thief the policeman. He will go with you and pretend to catch the thief, but nothing will be gained. So you must turn inward and see where the mind rises from, and then it will cease to exist.