Sri Ramakrishna Paramahamsa answer to the question how the mind of the spiritual aspirant rises into the higher realm.
There is much similarity between the seven ‘planes’ described in the Vedanta and the six ‘centres’ of Yoga. The first three planes of the Vedas may be compared to the first three Yogic centres, namely, Muladhara, Svadhisthana, and Manipura. With ordinary people the mind dwells in these three planes, at the organs of evacuation and generation and at the navel. When the mind ascends to the fourth plane, the centre designated in Yoga as Anahata, it sees the individual soul as a flame. Besides, it sees light. At this the aspirant cries: ‘Ah! What is this? Ah! What is this?’
When the mind rises to the fifth plane, the aspirant wants to hear only about God. This is the Vishuddha centre of Yoga. The sixth plane and the centre known by the yogi as Ajna are one and the same. When the mind rises there, the aspirant sees God. But still there is a barrier between God and the devotee. It is like the barrier of glass in a lantern, which keeps one from touching the light. King Janaka used to give instruction about Brahma Jnana from the fifth plane. Sometimes he dwelt on the fifth plane, and sometimes on the sixth.
After passing the six centers the aspirant arrives at the seventh plane. Reaching it, the mind merges in Brahman. The individual soul and the Supreme Soul become one. The aspirant goes into samadhi. His consciousness of the body disappears. He loses the knowledge of the outer world. He does not see the manifold anymore. His reasoning comes to a stop.