Srimad-Bhagavatam: Canto 7 - Chapter 1 - Verse 20
कामस्यान्तं हि क्षुत्तृड्भ्यां क्रोधस्यैतत्फलोदयात् ।जनो याति न लोभस्य जित्वा भुक्त्वा दिशो भुव: ॥ २० ॥
kāmasyāntaṁ hi kṣut-tṛḍbhyāṁkrodhasyaitat phalodayātjano yāti na lobhasyajitvā bhuktvā diśo bhuvaḥ
The strong bodily desires and needs of a person disturbed by hunger and thirst are certainly satisfied when he eats. Similarly, if one becomes very angry, that anger is satisfied by chastisement and its reaction. But as for greed, even if a greedy person has conquered all the directions of the world or has enjoyed everything in the world, still he will not be satisfied.
In Bhagavad-gītā (3.37) it is stated that lust, anger and greed are the causes of the conditioned soul’s bondage in this material world. Kāma eṣa krodha eṣa rajo-guṇa-samudbhavaḥ. When strong lusty desires for sense gratification are unfulfilled, one becomes angry. This anger can be satisfied when one chastises his enemy, but when there is an increase in lobha, or greed, which is the greatest enemy caused by rajo-guṇa, the mode of passion, how can one advance in Kṛṣṇa consciousness? If one is very greedy to enhance his Kṛṣṇa consciousness, this is a great boon. Tatra laulyam ekalaṁ mūlam. This is the best path available.