Every living being in the universe performs actions only for the attainment of happiness. One might object, saying that practical experience shows that there are other goals like attaining wealth, having children, friends and so on, for which actions are performed. But, in fact only that unknown bliss is being sought through these goals. This fact is stated by Veda Vyasa in the Bhagavatam: sarveshamapi bhutanam nripasvatmaiva . . . (Bhagavatam 10.14.50)
Some people claim that philosophers have accepted five aims of life - immortality, knowledge, independence, desire to control others and happiness. How then can it be proved that the attainment of happiness is the only aim of every living being? But here it should be noted that other goals such as eternal life, knowledge and so on, are only for the sake of attaining happiness.
We can thus conclude that every living being in the world - whether he be an ordinary person, a wicked man, a Saint or even God - is solely motivated by the aim of happiness in all his actions. However, if the path to attain happiness is right, one attains true happiness and if the path is wrong, one attains illusionary happiness, i.e. misery.
An extract from:
Prema Rasa Siddhanta - Philosophy of Divine Love,
Chapter One, The Ultimate Goal of All Living Beings, p. 3-4
Originally written in Hindi by Jagadguru Shri Kripalu Ji Maharaj