In plain words
The Ātma is your goal. You must not forget it. All night long you sang bhajans. Whatever rāga you sang in, whatever tāla you kept, your mind must be on the Ātma. Carry out your daily duties with the thought, “All action is for the pleasure of God.” When Arjuna asked, “If I am thinking of God all the time, how am I to fight the war?”, Kṛṣṇa: “Simpleton! It is your body that fights the war, not your mind! So set your mind on God,” he said.
What is sin? What is merit?
I told you yesterday: the senses are the root cause of all sin and all merit. So put your senses to good use. Nourish a good mind. Speak well. Do not look with evil eyes. Do not listen to evil words. Because he looked at Draupadī with an evil eye, Kīcaka was killed at Bhīma's hands. Because she listened to the evil words Mantharā spoke, Kaika sent Rāma, the embodiment of Dharma, to the forest. In fact Kaikeyī had loved Rāma even more than Bharata, the son she bore herself. Into that holy Prema Mantharā mixed poison. What did Kaikeyī gain by listening to her wicked counsel? Nothing. For listening to evil words, only an evil result came. Does anyone today name a child Kaika, or Mantharā? No. Society scorns those who spoke evil words and those who listened to them. So listen to good words and speak good words. If by some mistake evil things fall into your ears, you must wipe them from your mind at once, and not drop them into someone else's ear. When you yourself suffer for having heard evil things, why tell them and give pain to someone else too? By beating the ‘tom-tom’ about evil things, you not only ruin yourselves but ruin society as well. The misuse of the senses sinks you in sin; the good use of the senses brings you merit. “Paropakāraḥ puṇyāya pāpāya parapīḍanam.” Giving pain to others is sin; giving them joy is merit. You sang bhajans all night long. Bhajan gives joy to everyone. In it there is no abuse of others, no harm to others.