Śrīmad-Bhāgavatam 7.9.15
—
Māyāpur, February 22, 1976
So in order to know all this transcendental subject matter, it is recommended, tad-vijñānārthaṁ sa gurum evābhigacchet: [MU 1.2.12] "One must approach to the proper guru to understand this subject matter." And that is success of human life. Otherwise, to live like cats and dogs—sa eva go-kharaḥ: [SB 10.84.13] cows and asses, animal life—this is not civilization. So our this Kṛṣṇa consciousness movement is an attempt, however small it may be, to bring back the human society to real civilization. It is not ordinary movement. They are not civilized. Mūḍha. This is a civilization of rascals and fools. But to bring them back to knowledge, that is civilization. That civilization is spiritual life. Athāto brahma jijñāsā. This human life is meant for spiritual life, not for material life like cats and dogs. This is not required. This is Vedānta philosophy, athāto brahma jijñāsā. One must try to learn what is the ultimate source of everything, not that theorizing or, what is called, imagining something.
Take knowledge from the right source, brahma-vidyā, the Vedic knowledge, and try to understand the situation, what is Brahman, what you are. We are also Brahman. Ahaṁ brahmāsmi. These things are to be known. And when we neglect to understand these things, that means we are going to the wrong way of life. The wrong way of life can be allowed up to the animal life. Out of 8,400,000 forms of life, the animal life, three million types of animal life, by evolutionary process we come to the human life. Now we should inquire about spiritual life. That is civilization. Without spiritual life, without inquiring the spiritual life, it is animal life. Sa eva go-kharaḥ [SB 10.84.13]. So try to understand this Kṛṣṇa consciousness movement. And spiritual life means to understand Kṛṣṇa. That is spiritual life. Kṛṣṇa comes to explain Himself. And hear from Him and understand Him as He says. Then, as soon as you understand Kṛṣṇa, your life is successful. This is Kṛṣṇa consciousness movement.