People commit many offences, knowingly or unknowingly, not only in this life, but also in previous lives. The imprint of these actions is carried by the subconscious memory (Chitta) over many lives. When the mirror of the mind is soiled by these relics, the mind cannot perceive anything in its true state. This is the reason why people are unable to recognise their own true nature. Hence it is necessary to cleanse the mirror of impurities on it. This is done by regulating your food and recreational habits! You must ensure that the food you eat is obtained through righteous means. Many sufferings today are only because people consume food obtained by unrighteous means. It may not always be possible to ensure highest purity at all times. To get over this difficulty, there is an easy and effective solution! Before eating, offer the food to God! Then it becomes a gift from God (prasadam) and all impurities in the food are removed. This helps in cleansing the mind. Continue this practice always!