So to control over the material urges, that is required in spiritual life. We have to come to the spiritual platform. That is called tapasya. Tapo divyaṁ putrakā yena sattvaṁ yasmād brahma-saukhyaṁ tv anantam (SB 5.5.1). We are searching after happiness, but in the material world you cannot have happiness. That's a fact. Whatever little happiness you get, that is also distress. One has to attain to that stage of happiness with distress. So that is a long history; everyone knows that happiness is not possible. But we arrange to get so-called . . . Happiness means sense gratification. That is not happiness. Sukham ātyantikaṁ yat tad ātindriya grāhyam (BG 6.21). Directly sense perception is not happiness. These things are in the Bhagavad-gītā, you will find: sukham ātyantikaṁ yat tad atīndriyaṁ grāhyam. Ātindriyam means beyond these material senses, transcendental, there is another happiness. That is transcendental bliss. That we perceive little bit while we are chanting. By chanting, chanting, chanting, when you'll be purified, then you will have the opportunity of tasting that transcendental bliss. Otherwise, the so-called happiness derived from the senses, that is not happiness. That is crude; that is for the fools and rascals. That is not happiness.
So we should utilize our time very carefully. Puṁso varṣa-śatam . . . Because here is the calculation that although, supposing that I shall live for one hundred years, puṁso varṣa-śataṁ hy āyus tad-ardhaṁ cājitātmanaḥ (SB 7.6.6). Immediately, those who are not controlling the senses, ordinary, they are immediately at least half minus, fifty years gone for sleeping. And then niṣphalaṁ yad asau rātryāṁ śete andhaṁ prāpitas tamaḥ. So in this way, if you are actually serious . . . It is not that we are imposing something. We must be serious about the Kṛṣṇa consciousness business, that simply by understanding Kṛṣṇa or simply being Kṛṣṇa conscious, we become liberated