We understand what is guru. Guru-mukha-padma-vākya, citette kariyā aikya, āra nā kariya mane āśā. This is that. This is wanted. If you have got real guru and if you follow him, then your life is successful. There is no doubt. But if you have a so-called bogus guru, and without any knowledge of the śāstra, then your life will be spoiled. Especially the Māyāvādī guru, Caitanya Mahāprabhu has warned, māyāvādī-bhāṣya śunile haya sarva-nāśa (CC Madhya 6.169). Māyāvādī guru means one who thinks that everyone is God. That is Māyāvādī guru. If you approach such guru, then your life is spoiled. Māyāvādī-bhāṣya śunile haya sarva-nāśa. Finished. Your spiritual progress finished.