Material achievements are not the ultimate goal of devotional service. The ultimate goal of devotional service is love of Godhead. Therefore although Prahlāda Mahārāja, Dhruva Mahārāja, Ambarīṣa Mahārāja, Yudhiṣṭhira Mahārāja and many devotee kings were materially very opulent, they accepted their material opulence in the service of the Lord, not for their personal sense gratification. Of course, possessing material opulence is always fearful because under the influence of material opulence one may be misdirected from devotional service. Nonetheless, a pure devotee (anyābhilāṣitā-śūnyam [Bhakti-rasāmṛta-sindhu anyābhilāṣitā-śūnyaṁ
jñāna-karmādy-anāvṛtam
ānukūlyena kṛṣṇānu-
śīlanaṁ bhaktir uttamā