The most dangerous animal is a mad elephant, for if a mad elephant enters a garden, it causes tremendous damage to plants and trees. An offense to a pure devotee of the Lord is called vaiṣṇava-aparādha, the mad elephant offense. In the discharge of devotional service, an offense to the feet of a pure devotee creates havoc and stops one's advancement. Thus one has to defend the plant of bhakti by fencing it off properly and taking care not to offend pure devotees. Then the plant of devotional service will be properly protected.
An offense to a pure devotee is one of the ten offenses against the holy name. The first offense is to blaspheme the great devotees who have tried to spread the glories of the holy name all over the world. The greatest offender at the feet of the holy name is the rascal who is envious of such devotees. The holy name of Kṛṣṇa is nondifferent from Kṛṣṇa, and Lord Kṛṣṇa cannot tolerate offenses against a pure devotee who, following the order of his spiritual master, is spreading the holy name all over the world. The second offense is to deny that Lord Viṣṇu is the Absolute Truth. Since there is no difference between the Lord and His name, qualities, form and pastimes, or activities, one who sees a difference is considered an offender. The Lord being supreme, no one is equal to or greater than Him. Consequently, one who thinks that the name of some demigod is equal to the Lord's name is an offender. The Supreme Lord and the demigods should never be considered on the same level.
The third offense is to consider the bona fide spiritual master to be a common man. The fourth offense is to blaspheme the Vedic literature—the Vedas and such corollaries as the Purāṇas. The fifth offense is to consider the glories of the holy name to be exaggerations. The sixth offense is to imagine a perverted meaning of the holy name.