Śrīmad-Bhāgavatam · Text 7.1.27
Who is speaking and story frame
यथा वैरानुबन्धेन मर्त्यस्तन्मयतामियात् ।
न तथा भक्तियोगेन इति मे निश्चिता मति: ॥ २७ ॥
yathā vairānubandhena
martyas tan-mayatām iyāt
na tathā bhakti-yogena
iti me niścitā matiḥ
Nārada Muni continued: By devotional service one cannot achieve such intense absorption in thought of the Supreme Personality of Godhead as one can through enmity toward Him. That is my opinion.
Read Śrīla Prabhupāda's purport on Vedabase.io