Prabhupāda: Caitanya Mahāprabhu says,
- sādhu saṅga sādhu saṅga sarva śāstra kaya
- lava mātra sādhu saṅge sarva siddhi haya
- (CC Madhya 22.54)
"Even a moment's association with a pure devotee—all success." Not necessarily that one has to acquire it previous, no. Generally it is so, but sādhu sanga has got its effect. Caitanya Mahāprabhu said, lavamatra sādhu sanga sarva siddhi haya. You have not read in the Sanātana-śikṣā in the Teachings of Lord Caitanya?