What is that real religious principle? That is stated in the last instruction: sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja (BG 18.66). This is real religion, to surrender unto the Supreme Personality of Godhead. That's all. This is done even by great philosophers. He has to do that. Bahūnāṁ janmanām ante (BG 7.19). But he's now mentally speculating to find out the Absolute Truth, but when his knowledge will be mature, bahūnāṁ janmanām, after many, many births of speculation, bahūnāṁ janmanām ante jñānavān māṁ prapadyate, when he is actually in knowledge, he surrenders unto the Supreme Lord, vāsudevaḥ sarvam iti (BG 7.19): "Oh, Lord Kṛṣṇa, Vāsudeva, Vāsudeva is everything." Sa mahātmā sudurlabhaḥ: "Such kind of great soul is very rare."
But fortunately, we have got these instruction of Bhagavad-gītā, and the teacher is Lord Caitanya. If we follow these principles and try to understand it with all our knowledge, all our logic and argument, then our life is successful. Here is an opportunity: the movement of Kṛṣṇa consciousness. And it is very easy. You simply sit down. If you don't like to come to this temple, it doesn't matter.
At . . . in your home only, you sit down with your friends, with your boyfriend or girlfriend or family members, children. Sit down and chant Hare Kṛṣṇa. If you have got a nice musical instrument, it is all right. Otherwise, God has given you these hands. You can clap, (claps) "Hare Kṛṣṇa." Very easy. Just try it, and you will understand everything gradually. Ceto-darpaṇa-mārjanam (CC Antya 20.12, Śikṣāṣṭaka 1). By simply chanting Hare Kṛṣṇa, gradually all coverings, all dust accumulated on the mirror of your . . . and what are the activities. These five things are there: God, the living entity, the material nature, the time and the activities. If you can thoroughly study these five principles, then you become perfectly advanced in knowledge, and your life is successful. And all this will be possible simply by this chanting Hare Kṛṣṇa. And when your mind will be cleansed, you will be able to understand the instruction of Bhagavad-gītā automatically. These things are there.