To loose money, prestige, health or even life itself is not such a loss. To loose faith is the greatest loss.
There are many societies and associations of pure devotees and if someone with just a little faith begins to associate with such societies, his advancement to pure devotional service is rapid.
No amount of study of scriptures, austerity or charity can help us know God. The only way is to follow the footsteps of saintly people. When we have faith in that, that faith shows us the way.
Faith is the very substance of spirituality. To protect and develop our faith is the greatest need in spiritual life.