Daily Reading: Bhagvad Gita As it is- Page-128

Bg 3.31

ye me matam idaṁ nityam
anutiṣṭhanti mānavāḥ
śraddhāvanto ’nasūyanto
mucyante te ’pi karmabhiḥ

Translation: 

Those persons who execute their duties according to My injunctions and who follow this teaching faithfully, without envy, become free from the bondage of fruitive actions.

Purport: 

The injunction of the Supreme Personality of Godhead, Kṛṣṇa, is the essence of all Vedic wisdom and therefore is eternally true without exception. As the Vedas are eternal, so this truth of Kṛṣṇa consciousness is also eternal. One should have firm faith in this injunction, without envying the Lord. There are many philosophers who write comments on the Bhagavad-gītā but have no faith in Kṛṣṇa. They will never be liberated from the bondage of fruitive action. But an ordinary man with firm faith in the eternal injunctions of the Lord, even though unable to execute such orders, becomes liberated from the bondage of the law of karma. In the beginning of Kṛṣṇa consciousness, one may not fully discharge the injunctions of the Lord, but because one is not resentful of this principle and works sincerely without consideration of defeat and hopelessness, he will surely be promoted to the stage of pure Kṛṣṇa consciousness.

Bg 3.32

ye tv etad abhyasūyanto
nānutiṣṭhanti me matam
sarva-jñāna-vimūḍhāṁs tān
viddhi naṣṭān acetasaḥ

Translation: 

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: 

The flaw of not being Kṛṣṇa 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, Paramātmā and the Personality of Godhead, due to a vacant heart. Therefore there is no hope of perfection of life for him.