You have to work for Krsna sincerely, intelligently, and victory or defeat, it doesn't matter. Just like Jatayu was defeated fighting with Ravana. His wings were cut off. Ravana was very strong. And Lord Ramacandra, He did his last funeral ceremonies

Expressions researched:
"You have to work for Kṛṣṇa sincerely, intelligently, and victory or defeat, it doesn't matter. Just like Jaṭāyu was defeated fighting with Rāvaṇa. His wings were cut off. Rāvaṇa was very strong. And Lord Rāmacandra, He did his last funeral ceremonies"

Srimad-Bhagavatam Lectures

You have to work for Kṛṣṇa sincerely, intelligently, and victory or defeat, it doesn't matter. Just like Jaṭāyu was defeated fighting with Rāvaṇa. His wings were cut off. Rāvaṇa was very strong. And Lord Rāmacandra, He did his last funeral ceremonies because he was a devotee. This is the process, not that we have to learn something extra.

Lecture on SB 7.9.9 -- Mayapur, March 1, 1977:

So our this movement is based on practical activity. Whatever talent you have got, whatever little strength you have got, education you have got . . . You haven't got to learn anything. Whatever you have got, in whatever position you are, you can serve Kṛṣṇa. Not that you have to learn something first and then you can serve. No. The service itself is learning. The more you try to render service, the more you become advanced how to become experienced servant. We don't require any extra intelligence. Otherwise . . . The example is gaja-yūtha-pāya. The elephant, the king of the elephants, he satisfied. He's an animal. He's not a brāhmaṇa. He's not a Vedantist. Maybe very big, fatty animal, (chuckles) but after all, he's animal. Hanuman was animal. There are many such things. Jaṭāyu was a bird. So how they satisfied? The Jaṭāyu fought with Rāvaṇa. Yesterday you saw. Rāvaṇa was kidnapping Sītā devi, and Jaṭāyu, the bird, he was going, flying. Rāvaṇa knew how to fly without machine. He was very, very materially powerful. So the Jaṭāyu attacked him on the sky: "Who are you? You are taking away Sītā. I shall fight you." So Rāvaṇa was very powerful. He was defeated, Jaṭāyu, but he fought. That is his service. Never mind defeated. Similarly, we have to fight. Those who are opposing Kṛṣṇa consciousness movement, we have to fight with them to our best capacity. Never mind if we are defeated. That is also service. Kṛṣṇa sees the service. Defeated or victorious, depend on Kṛṣṇa. But fighting must be there. Karmaṇy evādhikāras te mā phaleṣu kadācana (BG 2.47). That is the meaning. You have to work for Kṛṣṇa sincerely, intelligently, and victory or defeat, it doesn't matter. Just like Jaṭāyu was defeated fighting with Rāvaṇa. His wings were cut off. Rāvaṇa was very strong. And Lord Rāmacandra, He did his last funeral ceremonies because he was a devotee. This is the process, not that we have to learn something extra. Whatever capacity we have got, let us decide to render service to the Lord. It doesn't require that you must be very rich or very beautiful, very bodily strong. Nothing of the sort. Sa vai puṁsāṁ paro dharmo yato bhaktir adhokṣaje ahaituky apratihatā (SB 1.2.6). In any condition, your devotional service should not be stopped. That should be the principle, that we are not going to stop, any circumstance. And Kṛṣṇa is prepared even to accept a little flower, little water. Patraṁ puṣpaṁ phalaṁ toyaṁ (BG 9.26). He doesn't say, "Give Me very luxurious and palatable dishes. Then I'll . . ." He'll be satisfied. No. The real necessity is bhakti. Patraṁ puṣpaṁ phalaṁ toyaṁ yo me bhaktyā prayacchati. This is real necessity—bhaktyā. Bhaktyā mām abhijānāti yāvān yaś ca . . . (BG 18.55).