Prabhupāda: If you utilize the energy for your sense gratification then you are misusing it. So anyone who is not in Kṛṣṇa consciousness, he's spoiling his time, wasting his life and subjecting himself in so many laws of nature. So these things are very nicely explained in this Bhagavad-gītā As It Is. This is the preliminary study of Kṛṣṇa consciousness and if one studies this book nicely then he goes to other books. I've got this Śrīmad-Bhāgavatam. This is also Kṛṣṇa consciousness. But the project is very great. It will have to be finished in sixty volumes like this. So about ten, twelve volumes are already finished. So I'm going on working on this.