By performing Vedic ritualistic activities, by giving money in charity and by undergoing austerity, one can temporarily become free from the reactions of sinful activities, but at the next moment he must again become engaged in sinful activities. For example, a person suffering from venereal disease on account of excessive indulgence in sex life has to undergo some severe pain in medical treatment, and he is then cured for the time being. But because he has not been able to remove the sex desire from his heart, he must again indulge in the same thing and become a victim of the same disease. So medical treatment may give temporary relief from the distress of such venereal disease, but unless one is trained to understand that sex life is abominable, it is impossible to be saved from such repeated distress. Similarly, the ritualistic performances, charity and austerity which are recommended in the Vedas may temporarily stop one from acting in sinful ways, but as long as the heart is not clear, one will have to repeat sinful activities again and again.
Another example given in Śrīmad-Bhāgavatam concerns the elephant who enters into a lake and takes a bath very seriously, cleansing his body thoroughly. Then as soon as he comes onto shore he again takes some dust from the earth and throws it over his body. Similarly, a person who is not trained in Kṛṣṇa consciousness cannot become completely free from the desire for sinful activities. Neither the yoga process nor philosophical speculations nor fruitive activities can save one from the seeds of sinful desires. Only by being engaged in devotional service can this be done.