The third yoga sutra explains about the elevated yogis, who are successful in channelising their energies towards an abundant flow of nature`s energy. Even if sadhana fails to to bring about a total transformation, a sadhaka`s path to evolution is certainly guranteed. When a yogi has been disciplined by yogic practice, he is successful in attaining evolution and emancipation. Thus, nature`s abundant energy aids a sadhaka to regularise his flow of energy, and gain spiritual growth and become liberated from pains.

nimittam incidental, instrumental, efficient cause, a pretext
aprayojakam not useful, of no use, those which do not move into action
prakriinam of natural tendencies or potentialities
oaranam covers, veils, obstacles
bhedah split, division, separation
m but, on the contrary, on the other hand, nevertheless
tatah from that
ksetrikavat like a farmer, like a peasant, like a husbandman

Nature`s efficient cause does not impel its potentialities into action, but helps to remove the obstacles to evolution, just as a farmer builds banks to irrigate his fields.

Culture of the germinated consciousness is of profound importance in yoga. As a farmer builds dykes between fields to regulate the flow of water, evolved yogis channelise the rich flow of nature`s energy to liberate themselves from the bondage of their actions and develop spiritual insight. Even if sadhana fails to give rise to complete transformation in the life of a sadhaka, it certainly serves to remove hindrances in the path of his evolution.

Previous good actions indirectly become instrumental in accelerating the flow of natural tendencies for the good of the consciousness. A farmer stacks up banks of earth to collect water and soak part of a field. When one area is soaked, he opens the bank to enable the water to flow into the adjoining area, continuing until the entire field is exhaustively irrigated. Then he sows the best seeds to get the best of harvests, and enjoys the fruits. Through yogic discipline, the yogi removes all obstacles to his evolution, and relishes emancipation.

Thus disciplined, the yogi`s enhanced energy spontaneously removes all fluctuations and afflictions which thwart his spiritual growth, enabling him to gain insight into his very being, his soul.

This sutra is a beauty in itself. Nature`s energy now flows profusely in the sadhaka. This energy is built up and concentrated through practice of osana, prdnaydma and bandha, which can be thought of as `dykes` in the system to regulate and channelise energy, so that mind and intelligence may permeate evenly throughout one`s being.

Judicious use of energy builds courage, strength, wisdom and freedom. This is cultivation of talent, which may transform itself to the level of genius. (1.2, 18, 29-39; n.2, 12, 13, 18; 11.29-m.15.)