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The Nector of Devotion
The idea is that we should follow in the footsteps of great devotees. If we are unable to execute all the different items of devotional service, we must try to execute at least one of them, as exemplified by previous  ācāryas . If we are engaged in the execution of all the items of devotional service, as was Mahārāj Ambarīṣa, then the perfection of devotional service is guaranteed from each one of these items. With the first complete engagement, one becomes automatically detached from material contamination, and liberation becomes the maidservant of the devotee. This idea is confirmed by Bilvamangala Thākur: If one develops unalloyed devotion to the Lord, liberation will follow the devotee as his maidservant.
Śrīla Rūpa Gosvāmī says that the regulative principles of devotional service are sometimes described by authorities as the path of serving the Lord in opulence.