What exists in truth is the Self alone. The world, the individual soul and God are appearances in it. Like silver in mother-of-pearl, these three appear at the same time and disappear at the same time. The Self is that where there is absolutely no 'I thought'. That is called 'Stillness'. The Self itself is the world; the Self itself is 'I'; the Self itself is God; all is Siva, the Self.
Ramana MaharshiThere is no reaching the Self. If Self were to be reached, it would mean that the Self is not here and now but that it is yet to be obtained. What is got afresh will also be lost. So it will be impermanent. What is not permanent is not worth striving for. So I say the Self is not reached. You are the Self; you are already That.
Ramana MaharshiConcentration 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.
Ramana MaharshiThe greatest obstacle to enlightenment is getting past your delusion that you are not already enlightened.
Ramana Maharshi