The original sentence, equating to 'You are among the few. . .' , has a literary or poetic feel about it. Many readers would think there was a word missing.
Including one puts the sentence into plain English, which anybody would understand.
Please note that a better title would have been You are of the few who will be equal to it.
The reason for this is that at a later date we might want to return to this thread to comment further. The title which includes the sentence you are asking about would help us to find it more easily.
Student or Learner