The verdict of all revealed scriptures is that by even a moment’s association with a pure devotee, one can attain all success. (CC Madhya 22.54)

Association with a pure devotee for even half a moment in this material world is the greatest treasure for human society (CC Madhya 22.85)

Pure devotional service in Krishna consciousness cannot be had even by pious activity in hundreds and thousands of lives. It can be attained only by paying one price—that is, intense greed to obtain it. If it is available somewhere, one must purchase it without delay. (CC Madhya 8.70)

He reasons ill who says that Vaishnavas die
When thou art living still in sound!
The Vaishnavas die to live, and living try
To spread the holy name around!

(Srila Bhaktivinoda Thakura)