SB 2.7.48
sadhryan niyamya yatayo yama-karta-hetim
jahyuh svarad iva nipana-khanitram indrah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In such a transcendental state there is no need of artificial control of the mind, mental speculation or meditation, as performed by the jñanis and yogis. One gives up such processes, as the heavenly King, Indra, forgoes the trouble to dig a well.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
A poor man in want of water digs a well and undertakes the trouble of digging. Similarly, those who are poor in transcendental realization speculate on the mind or meditate by controlling the senses. But they do not know that such control of the senses and achievement of spiritual perfection are simultaneously made possible as soon as one is factually engaged in the transcendental loving service of the Supreme Person, the Personality of Godhead. It is for this reason that the great liberated souls also desire to be associated in hearing and chanting the activities of the Lord. The example of Indra is very appropriate in this connection. King Indra of heaven is the controlling deity or demigod for arranging clouds and supplying rains in the universe, and as such he does not have to take the trouble to dig a well for his personal water supply. For him, digging a well for a water supply is simply ludicrous. Similarly, those who are factually engaged in the loving service of the Lord have attained the ultimate goal of life, and for them there is no need of mental speculation to find out the true nature of God or His activities. Nor do such devotees have to meditate upon the imaginary or real identity of the Lord. Because they are factually engaged in the transcendental loving service of the Lord, the Lord’s pure devotees have already achieved the results of mental speculation and meditation. The real perfection of life is therefore to be engaged in the transcendental loving service of the Lord.