1 Gita Sloka Every Day - Chapter 18 - Moksha Sanyasa Yoga - Sloka 36

The entire content of this mail is from Shri V N Gopala Desikan's  Srimad Bhagavad Gita, published by Vishishtadvaita Research Centre, Chennai and The Bhagavad Gita by Swami Chidbhavananda published by Ramakrishna Mission

The grades in the firmness of mind are being described now:

The Three Gunas Give Impetus to Karma - 18-40

1 Gita Sloka  Every Day - Chapter 18 - Moksha Sanyasa Yoga - Sloka 36

Sukham tu idanim trividham shrunu me bharata rishabha I

Abhyasat ramate yatra dukhantam cha ni gachati II sloka 36

सुखं तो इदनिं त्रिविधं शृणु मे भरत ऋषभ I 

अभयासात् रमते यत्र दुखन्तं च नि गच्छति II श्लोक 36

And now hear from me, O chief of the Bharats, the three kibds of happiness. That in which a man comes to rejoice by long praxtise and in which he reaches the end of his sorrow.

It is the search for happiness that given the impetus to life. There is no being in any region, that does not want happiness. Immeasurable is the effort exerted by beings in this direction. Still it is not the same measure of happiness that all obtain. Like a flash of lightning, it appears before a few, but before they behold it all, it disappears. Still the search does not stop and cannot be stopped. It goes on endlessly. There are others for whom the enjoyment of happiness is like pouring water into a leaky pot which knows no filling up. As it is being sought after from the world, it vanishes away into oblivion. Still the attempt to enjoy happiness is relentless. Hope of its success sustains life. There are however a rare few, whose experience of happiness is a unique phenomenon. Like the waxing moon, their joy is ever on the increase. They become heirs to the unobstructed delight bordering on blessedness. The cause behind the variation in the enjoyment of happiness is worth a study.

Abhyasa or practise is a powerful weapon to modify a man's mode of life. The utility of the physical exercise is self-evident. The culture of the mind, however, is more consequential. What is called an inherent trait is nothing other than persistent practise. A change of individuality ensues a change of practise. It holds true even in the case of animals. But practise brief and sporadic does not succeed. Prolongation of it has a far reaching effect. . Elimination of sorrow and attainment of abiding happiness are possible  by long practise.