‘sādhu-saṅga’, ‘sādhu-saṅga’–sarva-śāstre kaya
lava-mātra sādhu-saṅge sarva-siddhi haya
“The verdict of all revealed scriptures is that by even a moment’s association with a pure devotee, one can attain all success.
According to astronomical calculations, lava is one eleventh of one second
Chaitanya charitamrta Madhya-lila 22.54