As for happiness, it is one's essential nature. All suffering and misery pertain only to the body. If you do not identify yourself with the body, then the problem is not there.
Remember that the next breath may be your last and focus all your energies on self-enquiry.
Unless your spiritual practices are constant and steady, the tendency for action or inaction will gain the upper hand. You should, by effort counter these tendencies and try to remain in a state of equilibrium.
In such a state, there is only peace and perfect contentment. As the spells of equilibrium increase through constant meditation, then, happiness is felt more and more.
— N.N.Rajan, ‘More Talks With Ramana Maharshi’ p. 103