Because you are My very dear friend, I am speaking to you the most confidential part of knowledge. Hear this from Me, for it is for your benefit.
Always think of Me and become My devotee. Worship Me and offer your homage unto Me. Thus you will come to Me without fail. I promise you this because you are My very dear friend.
…”Just always think of Me.”…This is the most important instruction in all Vedic literature. What Kṛṣṇa is saying in this connection is the most essential part of knowledge, and it should be carried out not only by Arjuna but by all living entities.
…The most confidential part of knowledge is that one should become a pure devotee of Kṛṣṇa and always think of Him and act for Him. One should not become an official meditator. Life should be so molded that one will always have the chance to think of Kṛṣṇa. One should always act in such a way that all his daily activities are in connection with Kṛṣṇa. He should arrange his life in such a way that throughout the twenty-four hours he cannot but think of Kṛṣṇa. And the Lord’s promise is that anyone who is in such pure Kṛṣṇa consciousness will certainly return to the abode of Kṛṣṇa, where he will be engaged in the association of Kṛṣṇa face to face. This most confidential part of knowledge is spoken to Arjuna because he is the dear friend of Kṛṣṇa. Everyone who follows the path of Arjuna can become a dear friend to Kṛṣṇa and obtain the same perfection as Arjuna.
The Hare Krishna Movement 