The intelligent person knows well that one should search for water in the vicinity of seas and oceans and not in the desert. Every one of us is searching after real happiness in life, namely eternal life, eternal or unlimited knowledge and unending blissful life. But foolish people who have no knowledge of the substance search after the reality of life in the illusory material world. This material body does not endure eternally, and everything in relation with this temporary body, such as the wife, children, society and country, also change along with the change of body. This is called samsara, or repetition of birth, death, old age and disease. We would like to find a solution for all these problems of life, but we do not know the way.
It is suggested in Bhagavad-gita that anyone who wants to make an end to these miseries of life, namely repetition of birth, death, disease, and old age, must take to the process of worshiping the Supreme Lord and not others, as it is also ultimately suggested in the Bhagavad-gita (18.65), who is present in everyone's heart by His natural affection for all living beings, who are actually the parts and parcels of the Lord.
All so called happiness in the material world has a beginning and an end, but happiness with Krishna is unlimited, and there is no end. In order to get this happiness we simply have to spend a little time and chant Hare Krishna Maha-mantra every day!