With all do respect, that is utter nonsense. No one needs any mantra for anything. I am happy for you that it works for you, but stating this like a fact is ridiculous haha. Allow others the freedom to not be formed and conditioned by years of tradition please. That will only keep them blind for longer.
If you just put aside your belief systems about anything, even for a short moment, you will see that conscious clarity of awareness is very natural and need no structure or mental concept built around it for it to come into existence. That is all outer stuff and additional beliefs that you are taking in.
Tell me something: If you (any of you) think one needs a guru to come to realization, then how could someone ever reach enlightenment in the beginning of the human race. How did the first guru's do it if you say it is a fact that everyone needs a guru to learn and reach enlightenment?
And how do you explain all the cases of people becoming enlightened without a guru?
Then tell me again that it is a fact that you need a guru to reach the ultimate (which is simply your natural you, independently free and natural from any form, therefore, from any guru).
It cannot be that complex, it can not be so much based on mind and mental concepts. We are the ones creating these beliefs! and then the silly thing is, we actually go about and belief we are dependent on them, we need them for seeing, for realizing, for being. We are free already, we just need to see it. If we say we really need a guru (or a mantra, or anything else) before anything, then we will take the long way home.
I promise every single one of you who follow the path of the guru, mantra, or any traditional practice, and who really hangs on to those belief systems imposed on you by outer practices, that before your time of enlightenment comes, you will come to a stage of ultimate 'let go' and it will be something like a major breakdown.
Then you will see that all this practice and discipline wasn't truly helping you, it seemed like it did, you felt better and more happy, but that is not revolution, that is not transformation, that my friends, is not enlightenment.
You will see that all that you clinced to all your life and all that you ought to be sacred and special only kept you down and blinded you from the obviousness of your soul, your awareness, right here right now, the simplicity of it was not seen by you, because you were projecting so much additional stuff onto your future. Sooner or later you will see you are utterly free without anybody who needs to master you. A guru, mantra, discipline or practice, is merely to satisfy your insecurity. To be able to hold on to that.
I say be adventurous, be free, be who you are and stop all nonsense in yourself.
Just STOP!... and See...
Again and again, untill you realize your freedom at all times.