Sri Aurobindo translates Verse 6, of Chapter 1, Section 2 as follows: ” ‘Come with us’, ‘Come with us’, they cry to him, these luminous fires of sacrifice and they bear him by the rays of the sun speaking to him pleasant words of sweetness, doing him homage, ‘This is your holy world of Brahman and the heaven of your righteousness.’ ”
The context of this verse is to act as a transition from the exposition of the Vedic sacrifice and its relation to the ‘lower knowledge’ and the Upanishads focus hereafter on the ‘higher knowledge.’ The fruits of the aspiration and the development of the powers of the 7 planes of existence, the opening of the 7 chakras and the energetic release that comes therefrom, are primarily worldly results in various fields of endeavour. Whatever goals or desires one has, the systematic focus on and aspiration towards achieving them brings them nearer. The “pleasant words of sweetness” are the encouragements one receives as the desires are being fulfilled.
There is a long history of stories from the ancient texts about individuals who undertook various forms of intense discipline to achieve a goal and were thereby able to reach one of the divine heavens, where life fulfilled their needs and their desires for enjoyment. Eventually, when the force of the effort runs out, the momentum is gone, and they fall back to earth, to once again face the difficulties and issues and once again have to undertake serious efforts. The heaven of Brahman is a supreme reward for undertaking the Vedic sacrifice, but eventually it too recedes as the enjoyment overtakes the force of the discipline.
The Upanishad explains through ‘Come with us’ that there is a real attraction that takes place, a call to continue, as the discipline, the aspiration, the sacrifice proceed. The encouragement comes in the form of signs and results along the way and the implicit promise is that if one continues, there will be more and larger results. One will gain fame, or fortune, knowledge, or fulfillment of vital desires, material plenty and satisfaction through family, career and children. In other places the Upanishads make it clear that such is the result one can expect from efforts made on the seven planes of existence through focused effort and aspiration.
An example from the Taittiriya Upanishad illustrates this clearly: “She bringeth me wealth and extendeth it, yea, she maketh speedily my own raiment and cattle and drink and food now and always; therefore carry to me Fortune of much fleecy wealth and cattle with her.” (translated by Sri Aurobindo, The Upanishads, pg. 258) While we can appreciate that there is an inner sense to what shows up as obviously symbolic language in the context, it is also clear that there is a real outer meaning that illustrates the results to be attained through development of the powers of body, life, mind, knowledge, and existence-consciousness-bliss as they begin to manifest through the opening of the being to the powers of each level.
Sri Aurobindo, The Upanishads, Mundaka Upanishad, pp. 193-210