If one does not become Krsna conscious, his so-called success in this material world or failure, they have no value. Rather, if by sentiment somebody comes to Krsna consciousness and if for a few days he chants Hare Krsna mantra, their success, in future at least, guaranteed. So it is so nice thing. If you neglectfully chant, still there is success, but it will take some time. And if you chant very carefully, following the rules and regulations, then your success in this life is guaranteed. So we can make our choice, because always Krsna gives us the chance to make our choice.
Leсture on Shrimad-Bhagavatam 1.7.20-21, Vrndavana, 17 September 1976