Once the 19th century saint Vijaykrishna Goswami was asked how the mind may be taught one-pointedness. He gave this metaphysical analogy on how it may be achieved. There is a forest in which many wild animals live. They are not visible, since they are sly, cunning and dangerous. They lurk about to attack when least expected. However, when a fire is set to the trees, the animals rush out. So too it is with our mind. The fire of sadhana (regular practice) can release the hidden animals of our thought-patterns (or samskaras). Then the space becomes forever free of them. It becomes citta bhumi (the plane of pure consciousness).