A farmer desirous of raising crop must remove all weeds from his field. All varieties of weeds adversely affect the crop. Hence weeding is an essential pre-condition to get a good yield. Similarly, a spiritual aspirant eager to realise bliss (Atmananda), must remove from one’s heart the various manifestations of rajo and tamo gunas (qualities of passion and dullness) in the form of malice, desire, greed, anger, hatred and jealousy. These six types of enemies of man are the children of rajo and tamo gunas. None can experience the joy and bliss of the soul as long as these weeds are present. The entire world is a manifestation of the three gunas. Of these three, rajo and tamo gunas are the source of all trouble, sorrow, grief and problems. The six attributes of tamo gunaare sleep, drowsiness, fear, anger, laziness and inertia. Hence Lord Krishna asked Arjuna to remove the rajo and tamo gunasfrom his heart.