No Meditation on any kind of object is helpfull. in meditation on an object whether concrete or abstract you are destroying the sense of oneness and creating duality. medition on what you are in reality.—- Maharishi Ramana.
Comments; There are so many methods for prastice of mediation. some people said to focus on any object like flower or any deity figure. but Maharishi said you are destroying the sense of oneness and creating duality. beacuse then you are creating new problem of any figure.Maharishi wants to tell his method by which he got enlightnment.only objervation of your mind you are not creating a new problem.
I know a Saint who was disiple of my Guru St Nikka Singh ji.he used to concentrate on Figure of Rama. one day he told St. Nikka Singh ji that he has concreted so many years on Figure of Rama while reciting Nam Japa. and now he can feel everywhere picture of Rama. then St Nikka Singh ji advised him to leave this practice and start objervation of mind which is non -objective meditation. Then he started this practice but find very hard to leave the figure of Rama. he sometimes used to tell us that you should start from biggining non-objective meditation. to leave figure becomes a great problem. this will lead towards liberation.