“If you have faith in one but disrespect the other, your logic is like the logic of accepting half a hen. If you miss one point, there is a mistake in your calculation. Regardless of what you add or subtract after that, the mistake is already in the calculation, and everything that follows will also be faulty. We cannot simply accept that part of the scripture we like, and reject what we don’t like, and still expect to get the result. For example, a hen lays eggs with its back part and eats with its beak. A farmer may consider, “The front part of the hen is very expensive because I have to feed it. Better to cut it off.” But if the head is missing there will be no eggs anymore, because the body is dead. Similarly, if we reject the difficult part of the scriptures and obey the part we like, such an interpretation will not help us. We have to accept all the injunctions of the scripture as they are given, not only those that suit us. If you do not follow the first order, “Thou shalt not kill,” then where is the question of love of God?
Ref >> Srila Prabhupada Vani.