Ramakrishna Charitam III Vol III Book X Chp 4 Shlokas 6 - 9
दुरत्यया हि तन्मया मुमुक्षूणां जितात्मनाम् |
तस्मात्सर्वस्वभावेन परमेक्ष्वरमाश्रयेत् ||
मुमुक्षवो भजन्त्येव साधवः पुरुषोत्तमम् |
मुक्ताक्ष्चापि भजन्त्येन साधवो रसवित्तमाः ||
अक्षरब्रह्मनिष्ठाक्ष्च सनकाद्याः शुकादयः |
भजन्ति तं प्रेमपूर्वमात्मारामाक्ष्च योगिनः ||
प्रेमभक्त्यास्तु माःत्म्यमजानन्तः कुयोगिनः |
निन्दन्ति भक्तियोगञ्च भक्तांक्ष्च प्राज्ञमानिनः ||
It is very difficult to overcome Vishnu Maya even for those seers who have complete control over themselves and who want to gain moksha. Hence they surrender completely unto the Supreme Soul, the ultimate Godhead. The seers who aim at moksha worship Lord Purushottama only. Even those sadhus who attained moksha already, worship Him as they know the joy of worshipping Him. Great yogis like Shri Shula and the Snakes who were one with the Lord and who had complete realization of the self to worship Him with prima Bhakti. Those sadhakas (those who strive for spiritual attainments) who are not quite advanced and mature and who take pride I themselves as men of realization, humiliate the bhaktas and despise Bhakti yoga.