Real religion means to know God, our relation with Him and our duties in relation with Him and to know ultimately our destination after leaving this material body. The conditioned souls, who are entrapped by the material energy, hardly know all these principles of life. Most of them are like animals engaged in eating, sleeping, fearing and mating. They are mostly engaged in sense enjoyment under the pretension of religiosity, knowledge or salvation. They are still more blind in the present age of quarrel, or Kali-yuga. In the Kali-yuga the population is just a royal edition of the animals. They have nothing to do with spiritual knowledge or godly religious life. They are so blind that they cannot see anything beyond the jurisdiction of the subtle mind, intelligence or ego, but they are very much proud of their advancement in knowledge, science and material prosperity. They can risk their lives to become a dog or hog just after leaving the present body, for they have completely lost sight of the ultimate aim of life.
From Srila Prabhupada's purport to SB 1.3.43