In this age of Kali, there is no other alternative for self-realization than this chanting Hare Krsna. That is the practical, real fact. When you read Bible, you follow spiritual master . As soon as you read Bible, that means you are following the instruction of Lord Jesus Christ , that means you are following spiritual master . I was referring to a living spiritual master.
Spiritual master is eternal.
Spiritual master is eternal. So your question is without spiritual master. Without spiritual master you cannot be, at any stage of your life. You may accept this spiritual master or that spiritual master. That is a different thing.