to swell the pageant of its triumph

0Russell wrote:02br
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00" When, without the bitterness of impotent rebellion, we have learnt both to resign ourselves to the outward rules of Fate and to recognise that the non-human world is unworthy of our worship, it becomes possible at last so to transform and refashion the unconscious universe, so to transmute it in the crucible of imagination, that a new image of shining gold replaces the old idol of clay. In all the multiform facts of the world-01del00in the visual shapes of trees and mountains and clouds, in the events of the life of man, even in the very omnipotence of Death02del00-the insight of creative idealism can find the reflection of a beauty which its own thoughts first made. In this way 01b01u00mind 02u02b00asserts its subtle mastery over the thoughtless forces of Nature. 01font01b00The more evil the material with which 01font01u00it02u00 02font00deals, the more thwarting to untrained desire, the greater is its achievement in inducing the reluctant rock to yield up its hidden treasures, the prouder its victory in compelling the opposing forces01u00 01font00to swell the pageant of its triumph02font02u02b02font00."02br
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00Please help me to understand the blue sentence.02br
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001. Does "it" refer to "mind" in "in this way mind...?"02br
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002. Please tell me what Russell means by "to swell the pageant of its triumph."02br
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00Thank you so much in advance.02br
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00Cadzao0-