CC Madhya 16.262

vidyā-bhakti-buddhi-bale parama pravīṇa
tabu āpanāke māne tṛṇa haite hīna
Word for word: 
vidyā — education; bhakti — devotion; buddhi — and intelligence; bale — in strength; parama — very; pravīṇa — experienced; tabu — still; āpanāke — themselves; māne — they think; tṛṇa — a straw; haite — than; hīna — lower.
Translation: 
“Śrīla Rūpa and Sanātana are very much experienced in education, devotional service, intelligence and strength, yet they think themselves inferior to straw in the street.