In plain words
Dharmaja, the eldest of the Pāṇḍavas, followed just this path. Even amid the splendour of performing the Rājasūya sacrifice, he remembered Kṛṣṇa alone. Even at the time when his wife Draupadī was being dishonoured in the assembly, he did not let his Manas waver; crying 'Kṛṣṇa!', he remembered Kṛṣṇa alone. When Abhimanyu, Arjuna's son, was killed, Dharmaja remembered Kṛṣṇa alone. Even at the time when he suffered bodily hardships for twelve years and passed his days in the dense forests, Dharmaja remembered Kṛṣṇa alone. Even at the time when he won victory again and had himself crowned to the kingdom in Hastināpura, he remembered Kṛṣṇa alone. He did not grieve at all over hardships and sorrows. He went on living as a mere instrument. Lakhs of creatures are to be seen in the sea. Many creatures die. But the sea does not grieve for those that die, nor rejoice for those that are born. What happens goes on happening. They and the sea have no connection at all. Though all of it happens within him, he went on fostering evenness, steady of mind, not wavering in the least. In just the same way Dharmaja too went on remembering Kṛṣṇa, steady of mind through the hardships, losses, sorrows, griefs and joys that came in his life. To hold such equal-mindedness, to choose the lordship of all within oneself, to regard this world as only an illusion and to carry out Dharma: that is the duty of the true devotee. If Bhakti means only going to temples, doing pūjās, keeping vratas, cherishing a mountain of hopes within and breaking coconuts before God, all such things are petty acts. They are acts that insult God. Many people deceive even God to fulfil their mean desires. They are shaping Bhakti into a mere field of business. O God, I will give You this, You give me that: they are making it a business of this kind. He says, 'If I get ten lakhs in the lottery, I will give a thousand.' What is this: He gives ten lakhs, and a thousand rupees go back to God in return? Still others, who are in Ajñāna, give their worthless hair at Tirupati and ask for lofty wishes. Is this what we should ask for? This is not what we must achieve. What we must achieve is the Ānanda of the Ātma. We must achieve Prema for God. If even an atom of that Prema is there, we can achieve endless victory.
When we gain such Prema, everything merges in it.