To be considered highly learned, one must not only be well educated but also moral . (Nectar of Devotion 21)
The principle of regulated control is universal. (Beyond Birth and Death 1)
If the distinction between piety and sin is minimized, people will commit many atrocities in the name of God. (Srimad-Bhagavatam 11.20.5)
We cannot avoid making distinctions between moral and immoral acts, just as we cannot avoid distinguishing what is good or bad for the body, for social relationships, etc. (Srimad-Bhagavatam 11.21.3)
In this material world a sexual appetite necessitates distinction between moral and immoral conduct. (Sri Caitanya-caritamrta 4.35 purport)
Krishna consciousness is transcendental
Pleasing Krishna is transcendental to ordinary ethics and morality. (Srimad-Bhagavatam 10.47.29 purport, Srimad-Bhagavatam 3.2.17 purport, Srimad-Bhagavatam 10.22.20)
Krishna is beyond the jurisdiction of this material world and the mundane distinctions of moral and immoral. (Sri Caitanya-caritamrta Madhya 4.134 purport)
That which is in relationship to Krishna can never be immoral. E.g. Prahlada Maharaja garlanded his father's killer. (Teachings of Queen Kunti 10)
Even if our daily activities are a mixture of both moral and immoral, they become purified by offering the results to Krishna. (Reservoir of Pleasure)
Even if one commits the most abominable actions, if he is engaged in devotional service, he is to be considered saintly because he is properly situated. (Bhagavad-gita 9.30)
Those engaged in Krishna consciousness should not care for the so-called morality of the material world if that morality opposes the service of the Lord. (Sri Caitanya-caritamrta Madhya 3.212 purport)
Servants of Krishna are automatically moral and ethical. (Sri Caitanya-caritamrta Antya 9.142)
Following moral codes is not enough to attain Krishna consciousness, one must go beyond moral codes to attain Krishna consciousness (Bhagavad-gita 3.16 purport)
The last word in all morality and religion: surrender unto Krishna. (Bhagavad-gita 18.78 purport)
Krishna preferred to protect His devotee (from the brahmastra of Asvathama) than to keep His promise of not to take up a weapon. (Srimad-Bhagavatam 1.8.13 purport)
Material piety must be considered a means and never an absolute end (Srimad-Bhagavatam 11.20.5)
If one becomes a mundane moralist, forgetting the Supreme Lord, one's position is certainly imperfect, and one will not achieve the ultimate goal of piety, going back home, back to Godhead. (Srimad-Bhagavatam 11.20.5)
One who has developed great faith in the devotional service of Lord Krishna does not hesitate to do anything that will further the mission of the Lord. (Srimad-Bhagavatam 11.20.9)
"Anyone who has taken shelter of the lotus feet of Mukunda, the giver of liberation, giving up all kinds of obligation, and has taken to the path in all seriousness, owes neither duties nor obligations to the demigods, sages, general living entities, family members, humankind or forefathers." (Srimad-Bhagavatam 11.5.41)
Material discrimination is necessary but we must also accept the transcendental position of Krishna consciousness. There is a transcendental good beyond the relative good of the material world. (Srimad-Bhagavatam 11.21.3)
To overshadow God and devotional service with ethical principles ultimately meant to increase sense gratification is the greatest violence against society (Srimad-Bhagavatam 11.3.26 purport)