Effort is necessary for upto the stage of realiation . even then the self should spontaneously become evidence. otherwise happiness would not be complete. upto the stage of spontaneously there must be effort, in some form or other.——– Maharishi Ramana.
Comment; Maharishi Ramana told us from his direct knowledge of Samadhi that when we do practice of observation sometime first you got the experince of sa- vikalpa Samadhi . but it is not liberation, you have reached near but yet it is incomllete . so your effort should be carry on upto your satisfaction.