In plain words
In the same way he called three of the brothers. The others kept noticing even more things than Bhīma. Arjuna came. When he put this question to Arjuna, Arjuna spoke: ‘I see nothing but the one bird,’ he said. The true meaning of attaining the aim is just this: a person who has the earnest wish to learn keeps his aim only on what he longs to learn. Today the wish to learn is one thing, but its aims are many. Because things go this way, we cannot gain what we should gain, and we cannot reach what we should reach. We must set ourselves an aim like Arjuna's.
Good and Bad Depend Only on Virtues and Faults
And for grasping virtue, too, there is a small example in the Mahābhārata. Once, wishing to make a test, Kṛṣṇa sent for Duryodhana. This was before the war, while they were still friends. “Duryodhana! I have resolved to do a great work. For such a great work I need a person of truly good qualities; search the world and bring Me a man of good qualities,” He said. Duryodhana went and searched the whole world for some days; finding no good man anywhere, he came to Kṛṣṇa: ‘Svāmī! I have not seen a single person of good qualities in the world. In everyone's qualities I see some fault or other. You want a man of good qualities. So, of all there are, this fellow alone has good qualities; there is no one else with good qualities,’ and he pointed to himself. Saying, ‘All right, I shall get My work done through you alone,’ He sent him off somewhere. Next He sent for Dharmaja. ‘Search anywhere in the world: will you find and bring Me someone who lacks all virtue, an utter wretch, a base man, so bad that there is no one worse than him in the world?’ He commanded. Dharmaja too combed the whole world. In the end he came back alone. ‘Kṛṣṇa! Nowhere have I seen anyone bad. In everyone I see only the finest qualities. If there are still any bad qualities at all, a little here and there, they may be in this Dharmaja alone; but for me there are no bad people anywhere in the world,’ and he bowed down.