taṁ sukhārādhyam ṛjubhir
taṁ sukhārādhyam ṛjubhir ananya-śaraṇair nṛbhiḥ |
kṛtajñaḥ ko na seveta durārādhyam asādhubhiḥ ||
(Śrīmad Bhāgavatam: 3.19.36′; cited in Bhakti Sandarbha: 153)
“What grateful person would not worship he who is easily propitiated by persons who are sincere and of undivided shelter yet difficult to propitiate for the unvirtuous [i.e., those who are the opposite]?”