Concentration
Concentration is the divine instrument for revelation. People are of the opinion that if there is no concentration, meditation is useless. I can emphatically say that a man can never 'get' God by concentration, because in concentration you are one-pointed and you are not waiting for anything, while in meditation you wait for something and that is God. Waiting produces a sort of attraction automatically on account of continuous effort.
Taken from the book "Complete Works of Ram Chandra, Vol. 3 (1997; 1st Indian edn., 1999)", Chapter "1928", pg. 21, by Babuji Maharaj