PURPORT

Here is a depiction of materialists who have no knowledge of devotional service. They may be very religious and may work very systematically or perform austerities and penances but if they blaspheme the Supreme Personality of Godhead they are nothing but rogues. This is confirmed in the Hari-bhakti-sudhodaya (3.11):

bhagavad-bhakti-hinasya
jatih sastram japas tapah
apranasyaiva dehasya
mandanam loka-ranjanam

Without knowledge of devotional service to the Lord, great nationalism, fruitive, political or social work, science or philosophy are all simply like costly garments decorating a dead body. The only offense of persons adhering to these principles is that they are not devotees; they are always blasphemous toward the Supreme Personality of Godhead and His devotees.