Giving your pearls to the swine?

dear siblings in christ , if my neighbor asked me for example, whats your secret to growing such good vegetables? but my neighbor was swine, a no good man who brought bad things upon people, like in my case making bombs next door and getting caught by fbi. so do i tell them the truth? if i dont tell the truth then im lying and going against gods wish's, and if i do tell them im also going against gods wish not to give pearls to swine.. so what to do?