Lord Caitanya thought it—not thought it; this is a fact—that this sort of life, seeking material happiness . . . material happiness means sense gratification. That's all. Actually, according to Bhagavad-gītā—not according to Bhagavad-gītā, that is a fact according to any authoritative statement—sukham ātyantikaṁ yat tad atīndriyaṁ grāhyam (BG 6.21).
Śrī Kṛṣṇa says that sukham ātyantikam. Ātyantikam means the super, superhappiness, ātyantikam; means that which you cannot excel more. That is the final point. That sort of happiness is not possible to achieve . . .
Happiness . . . first of all, you must understand, happiness means sense gratification, happiness. You can understand it very easily. If I get some nice foodstuff, because I satisfy my taste, palate, I feel happiness, "Oh, very nice food I am eating." Similarly, you take any of your sense organs, when it is satisfied according to the sense object, it is called happiness. So the sum and substance of happiness is to satisfy the senses. But Kṛṣṇa says that sukham ātyantikam: the supermost happiness can be achieved not by these senses, but atīndriya. Atīndriya means transcendental senses.