Knowledge can dawn only when there is incessant and frequent meditation. Repetition has the power of annihilating this erroneous idea gradually. Meditation should be continued till the last trace of body idea is destroyed. When the body consciousness is totally annihilated, Brahman shines Itself in all Its pristine glory and purity. The meditator and the meditated become one.
Individuality vanishes in toto.
In the Taittiriya Upanishad III.2 we find that Bhrigu goes several times to his father Varuna and asks him again and again, to be taught the nature of Brahman. He told him this, viz., food, breath, the eye, the ear, mind and speech. That is Brahman. This injunction about repetition is meant for those only who lack in purity and subtle understanding and in whom a single enunciation is not sufficient to give them the direct cognition of Brahman. The individual soul is taught step by step to be subtler than the body, etc.