In devotional service, the apparent material opulence’s are not material; they are all spiritual.
A devotee’s ultimate achievement is to take shelter of the lotus feet of the Lord in any one of the planets in the spiritual sky. As a result of rigid execution of devotional service, a devotee receives all material opulences if these are required; otherwise, the devotee is not interested in material opulences, nor does the Supreme Lord award them. When a devotee is actually engaged in the devotional service of the Lord, his apparently material opulences are not material; they are all spiritual. For example, if a devotee spends money to construct a beautiful and costly temple, the construction is not material but spiritual (nirbandhah Krishna-sambandhe yuktam vairagyam ucyate). A devotee’s mind is never diverted to the material side of the temple. The bricks, stone and wood used in the construction of the temple are spiritual, just as the Deity, although made of stone, is not stone but the Supreme Personality of Godhead Himself. The more one advances in spiritual consciousness, the more he can understand the elements of devotional service. Nothing in devotional service is material; everything is spiritual. Consequently a devotee is awarded so-called material opulence for spiritual advancement. This opulence is an aid to help the devotee advance toward the spiritual kingdom.
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Sixth Canto, Chapter 16 – Text 29
