Efficacy of God's Name

Sri Ramana Maharshi:

You bear a name to which you answer. But your body was not born with that name written on it, nor did it say to any one that it bore such and such a name. And yet a name is given to you and you answer to that name, because you have identified yourself with the name. Therefore the name signifies something and it is not a mere fiction. Similarly, God's name is effective. Repetition of the name is remembrance of what it signifies. Hence the merit.