Human society primarily requires food for subsistence, shelter for sleeping, defense for protection, and commodities for satisfaction of the senses. The senses are the practical signs of life, as will be explained in the next verse. Human civilization is meant for purifying the senses, and objects of sense satisfaction should be supplied as much as absolutely required, but not for aggravating artificial sensory needs. Food, shelter, defense and sense gratification are all needs in material existence.
(Srimad Bhagavatam-------2:5:30------purport).

The fruitive worker wants reward for his work, the mystic wants some perfection of life, and the empiric philosopher wants to merge in the existence of the Lord. Somehow or other, as long as there is a demand for sense satisfaction, there is no chance for pacification; on the contrary, by unnecessary dry speculative arguments, the whole matter becomes distorted, and thus the Lord moves still further away from our understanding.
(Srimad Bhagavatam-------2:6:40-41------purport).

In the material world everyone is interested in money and sense gratification. The only objective is to earn as much money as possible and utilize it for satisfaction of the senses. Śrīla Śukadeva Gosvāmī thus described the activities of the materialistic persons:
nidrayā hriyate naktaṁ
vyavāyena ca vā vayaḥ
divā cārthehayā rājan
kuṭumba-bharaṇena vā
(S.B.2:1:3)
This is a typical example of materialistic persons. At night they waste their time by sleeping more than six hours or by wasting time in sex indulgence. This is their occupation at night, and in the morning they go to their office or business place just to earn money.

(Srimad Bhagavatam-------4:2:23------purport).

One who is situated in this perfect stage knows that because Kṛṣṇa is the proprietor of everything, everything must be used for the satisfaction of Kṛṣṇa. Arjuna did not want to fight for his own sense satisfaction, but when he became fully Kṛṣṇa conscious he fought because Kṛṣṇa wanted him to fight. For himself there was no desire to fight, but for Kṛṣṇa the same Arjuna fought to his best ability. Real desirelessness is desire for the satisfaction of Kṛṣṇa, not an artificial attempt to abolish desires.

(Bhagavad-Gita--------2:71--------purport).

When one acts in Kṛṣṇa consciousness for the satisfaction of the senses of Kṛṣṇa, any action, whether of the body, mind, intelligence or even the senses, is purified of material contamination. There are no material reactions resulting from the activities of a Kṛṣṇa conscious person. Therefore purified activities, which are generally called sad-ācāra, can be easily performed by acting in Kṛṣṇa consciousness.

(Bhagavad-Gita--------5:11--------purport).

There are two kinds of penance: one for sense gratification and the other for self-realization. There are many pseudo mystics who undergo severe penances for their own satisfaction, and there are others who undergo severe penances for the satisfaction of the senses of the Lord. For example, the penances undertaken to discover nuclear weapons will never satisfy the Lord because such a penance is never satisfactory. By nature's own way, everyone has to meet death, and if such a process of death is accelerated by anyone's penances, there is no satisfaction for the Lord.

(Srimad Bhagavatam-------2:9:20------purport).

Pure love on the transcendental platform is the paragon of purity devoid of material affection and completely spiritual. Affection for matter is perishable, as indicated by the inebriety of sex in the material world, but there is no such inebriety in the spiritual world. Hindrances on the path of sense satisfaction cause material distress, but one cannot compare that with spiritual separation. In spiritual separation there is neither inebriety nor ineffectiveness, as one finds with material separation.

Teachings of Lord Caitanya).