1 John 3:12

Do not be like Cain, who belonged to the evil one and murdered his brother. And why did he murder him? Because his own actions were evil and his brother's were righteous.

(v12, NIV)

Love one another. The opposite of this is what Cain did. We are to love one another, so we are not to be like Cain. Cain murdered his brother Abel. His actions were sinful and thus he belonged to the evil one. He who does what is sinful is of the devil, who has been sinning from the beginning. John continues on to say the reason why Cain murdered his brother Abel. Apparently, it was because Cain's actions were evil and his brother's were righteous. Do not be like him, being one who is of the devil.

My son, if sinners entice you,

do not consent.

If they say, "Come with us, let us lie in wait for blood;

let us ambush the innocent without reason;

(Proverbs 1:10-11, ESV)

I was reading proverbs and this passage in 1 John reminded me of it. In this one section, the writer is speaking to a son as a father's imparts wisdom and instruction. He is speaking with regards to sinners who are trying to entice you. What caught my attention was how they wish to ambush one who is innocent, similar to Cain murdering his righteous brother. The passage in Proverbs itself is not about that, but instead about wisdom regarding the reaction to sinners who entice you. However, I thought it was interesting to note the kinds of things the sinners say.