SB 10.40.6
eke tvakhila-karmani
sannyasyopasamam gatah
jñanino jñana-yajñena
yajanti jñana-vigraham
Translation:
In pursuit of spiritual knowledge, some persons renounce all material activities and, having thus become peaceful, perform the sacrifice of philosophic investigation to worship You, the original form of all knowledge.
Purport:
Modern philosophers pursue knowledge without bothering to worship the Supreme Personality of Godhead, and thus they naturally end up with meager, if not trivial, results.