We may find different reasons for losing our faith or find different excuses for not having faith in chanting. But actually anyone who has once received this Holy Name of the Lord in the proper disciplic succession and worships the Lord through this process of chanting the Holy Names of the Lord, must have firm faith and conviction in chanting the Holy Name of the Lord. That sraddha, that faith should be there even before accepting Vaisnava initiation.
January 10, 2010, Kiev, Initiation Lecture