anyabhilasita-sunyam jnana-karmady-anavrtam anukulyena krsnanu- silanam bhaktir uttama
[Cc. Madhya 19.167] "One should render transcendental loving service to the Supreme Lord Krsna favorably and without desire for material profit or gain through fruitive activities or philosophical speculation. That is called pure devotional service." Unless one is completely freed of all material desires, which are caused by the dense darkness of ignorance, one cannot fully engage in the devotional service of the Lord. Therefore we should always offer our prayers to Lord Nrsimha-deva, who killed Hiranyakasipu, the personification of material desire. Hiranya means "gold," and kasipu means "a soft cushion or bed." Materialistic persons always desire to make the body comfortable, and for this they require huge amounts of gold. Thus Hiranyakasipu was the perfect representative of materialistic life. He was therefore the cause of great disturbance to the topmost devotee, Prahlada Maharaja, until Lord Nrsimha-deva killed him. Any devotee aspiring to be free of material desires should offer his respectful prayers to Nrsimha-deva as Prahlada Maharaja did in this verse." SB 5.18.8