Happiness is your real nature. You identify with yourself with the body and mind, feel it's limitations, and suffer. Realize your true self in order to open the store of happiness. That true self is the reality, the Supreme Truth, which is the self of all the world you now see, the self of all the selves, the One real, the Supreme, the Eternal self - as distinct from the ego or the bodily idea for the self.
God dwells in you, as you, and you don't have to 'do' anything to be God-realized or Self-realized, it is already your true and natural state. Just drop all seeking, turn your attention inward, and sacrifice your ego mind to the One Self radiating in the Heart of your very being. For this to be your own presently lived experience, Self-Inquiry Meditation is a direct and immediate way.
There 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.
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.
How does one get rid of fear? Ramana: What is fear? It is only a thought. If there is anything besides the Self there is reason to fear. Who sees things separate from the Self? First the ego arises and sees objects as external. If the ego does not rise, the Self alone exists and there is nothing external. For anything external to oneself implies the existence of the seer within. Seeking it there will eliminate doubt and fear. Not only fear, all other thoughts centred round the ego will disappear along with it.