A method of self-enquiry
pioneered by Douglas Harding

Ramakrishna (1836 - 1886)

Sri Ramakrishna Paramahamsa was a Hindu religious teacher and an influential figure in the Bengal Renaissance of the Nineteenth century. His teachings emphasised God-realisation as the highest goal of life, love and devotion for God, the oneness of existence, and the harmony of religions.

From: http://en.wikipedia.org/wiki/Sri_Ramakrishna

Ramakrishna was initiated into God-realisation by the wandering monk Totapuri, who stuck a shard of glass between Ramakrishna's eyes and told him to concentrate his mind on that point. In this moment Ramadrishna saw God.

Later on, Vivekananda became one of his disciples.