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.
Ramana MaharshiTo 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.
Ramana MaharshiEvery living being longs always to be happy, untainted by sorrow; and everyone has the greatest love for himself, which is solely due to the fact that happiness is his real nature. Hence, in order to realize that inherent and untainted happiness, which indeed he daily experiences when the mind is subdued in deep sleep, it is essential that he should know himself. For obtaining such knowledge the inquiry 'Who am I?' in quest of the Self is the best means.
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 Maharshi