Vaishnava Samhita. Dhruvadasa Charitam. Vol II Book VI Chp 7 Shloka 1

श्रीसद्गुरुरुवाच 

दुर्लभं मानुषं जन्म दुर्लभः साधुसङ्गमः  |
दुर्लभा विष्णुभक्तिश्च गोपीभावः सुदुर्लभः  ||

Shri Sadguru said

Birth as a human being is very precious and rare. The association of the sadhus is very difficult to attain. Then too, to get Hari bhakti is impossible. Above all, Gopi Bhava is unattainable.