Bg 3.32

ye tv etad abhyasuyanto
nanutisthanti me matam
sarva-jñana-vimudhams tan
viddhi nastan acetasah

Word for word: 
ye — those; tu — however; etat — this; abhyasuyantah — out of envy; na — do not; anutisthanti — regularly perform; me — My; matam — injunction; sarva-jñana — in all sorts of knowledge; vimudhan — perfectly befooled; tan — they are; viddhi — know it well; nastan — all ruined; acetasah — without Krishna consciousness.

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
But those who, out of envy, disregard these teachings and do not follow them regularly are to be considered bereft of all knowledge, befooled, and ruined in their endeavors for perfection.

Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The flaw of not being Krishna conscious is clearly stated herein. As there is punishment for disobedience to the order of the supreme executive head, so there is certainly punishment for disobedience to the order of the Supreme Personality of Godhead. A disobedient person, however great he may be, is ignorant of his own self, and of the Supreme Brahman, Paramatma and the Personality of Godhead, due to a vacant heart. Therefore there is no hope of perfection of life for him.