The material existence of the living being is a diseased condition of actual life. Actual life is spiritual existence, or brahma-bhūta (S.B.4;30:20) existence, where life is eternal, blissful and full of knowledge. Material existence is temporary, illusory and full of miseries. There is no happiness at all. There is just the futile attempt to get rid of the miseries, and temporary cessation of misery is falsely called happiness. Therefore, the path of progressive material enjoyment, which is temporary, miserable and illusory, is inferior. But devotional service to the Supreme Lord, which leads one to eternal, blissful and all-cognizant life, is called the superior quality of occupation. This is sometimes polluted when mixed with the inferior quality.
(SRIMAD BHAGAVATAM--------1:2:6--------PURPORT).

The human form of life is a great asset, for in this life one can fulfill the goal of existence. Unfortunately, however, because of a lack of education and culture, people are victimized by the false happiness of sex life. Prahlāda Mahārāja therefore advises one not to be misled by this civilization of sense gratification, and especially not by sex life. Rather, one should be sober, avoid sense gratification and be Kṛṣṇa conscious. The lusty person, who is compared to a foolish miser, never gets happiness by sense gratification. The influence of material nature is very difficult to surpass, but as stated by Kṛṣṇa in Bhagavad-gītā (7.14), mām eva ye prapadyante, māyām etāṁ taranti te: if one voluntarily submits to the lotus feet of Kṛṣṇa, he can be saved very easily.
(SRIMAD BHAGAVATAM--------7:9:45--------PURPORT).

The Vedic wisdom guides us to understanding our relation with the Supreme Lord Śrī Kṛṣṇa and to acting accordingly in order to achieve the desired result of returning home, back to Godhead. But materialistic men do not understand this. They want to make a plan to become happy in a place where there is no happiness. For false happiness they try to reach other planets, either by Vedic rituals or by spacecraft, but they should know for certain that any amount of materialistic adjustment for becoming happy in a place which is meant for distress cannot benefit the misguided man because, after all, the whole universe with all its paraphernalia will come to an end after a certain period. Then all plans of materialistic happiness will automatically come to an end. The intelligent person therefore makes a plan to return home, back to Godhead. Such an intelligent person surpasses all the pangs of material existence, like birth, death, disease and old age. He is actually happy because he has no anxieties of material existence, but as a compassionate sympathizer he feels unhappiness for the suffering materialistic men, and thus he occasionally comes before the materialistic men to teach them the necessity of going back to Godhead. All the bona fide ācāryas preach this truth of returning home, back to Godhead, and warn men not to make a false plan for happiness in a place where happiness is only a myth.
(SRIMAD BHAGAVATAM--------2:2:27--------PURPORT).

In the material world, the spiritual energy of the Supreme Personality of Godhead is manifested as tāpa-karī, which means "causing miseries." Everyone hankers for happiness, but although happiness originally comes from the pleasure potency of the Supreme Personality of Godhead, in the material world, because of material activities, the pleasure potency of the Lord becomes a source of miseries (hlāda-tāpa-karī). False happiness in the material world is the source of distress, but when one's endeavors for happiness are redirected toward the satisfaction of the Supreme Personality of Godhead, this tāpa-karī element of misery is vanquished.
(SRIMAD BHAGAVATAM--------6:4:27-28--------PURPORT).