SB 5.14.2
yasyam u ha va ete sad-indriya-namanah karmana dasyava eva te; tad yatha purusasya dhanam yat kiñcid dharmaupayikam bahu-krcchradhigatam saksat parama-purusaradhana-laksano yo ’sau dharmas tam tu samparaya udaharanti; tad-dharmyam dhanam darsana-sparsana-sravanasvadanavaghrana-sankalpa-vyavasaya-grha-gramyopabhogena kunathasyajitatmano yatha sarthasya vilum-panti.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In the forest of material existence, the uncontrolled senses are like plunderers. The conditioned soul may earn some money for the advancement of Krsna consciousness, but unfortunately the uncontrolled senses plunder his money through sense gratification. The senses are plunderers because they make one spend his money unnecessarily for seeing, smelling, tasting, touching, hearing, desiring and willing. In this way the conditioned soul is obliged to gratify his senses, and thus all his money is spent. This money is actually acquired for the execution of religious principles, but it is taken away by the plundering senses.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Purva janmarjita vidya purva janmarjitam dhanam agre dhavati dhavati. By following the principles of the varnasrama-dharma, one attains a better position in the material world. One may be rich, learned, beautiful or highborn. One who has all these assets should know that they are all meant for the advancement of Krsna consciousness. Unfortunately, when a person is misguided he misuses his high position for sense gratification. Therefore the uncontrolled senses are considered plunderers. The good position one attains by executing religious principles is wasted as the plundering senses take it away. By executing religious principles under the laws of varnasrama-dharma, one is placed in a comfortable position. One may very easily use his assets for the further advancement of Krsna consciousness. One should understand that the wealth and opportunity one gets in the material world should not be squandered in sense gratification. They are meant for the advancement of Krsna consciousness. This Krsna consciousness movement is therefore teaching people to control the mind and five knowledge-acquiring senses by a definite process. One should practice a little austerity and not spend money on anything other than the regulative life of devotional service. The senses demand that one see beautiful things; therefore money should be spent for decorating the Deity in the temple. Similarly, the tongue has to taste good food, which should be bought and offered to the Deity. The nose can be utilized in smelling the flowers offered to the Deity, and the hearing can be utilized by listening to the vibration of the Hare Krsna mantra. In this way the senses can be regulated and utilized to advance Krsna consciousness. Thus a good position might not be spoiled by material sense gratification in the form of illicit sex, meat-eating, intoxication and gambling. One spoils an opulent position in the material world by driving cars, spending time in nightclubs or tasting abominable food in restaurants. In these ways, the plundering senses take away all the assets that the conditioned soul has acquired with great difficulty.