Good job, Imrasch. You posted while I was writing my reply. We have some different answers. (I totally missed Luke 6:31) But both the verses you posted, and the ones that I posted, show that slight variations in wording can make for huge differences in meaning. I love BibleGateway.com. I can compare tons of translations, and by comparison, hope to get the general gist of the verse.
That does bring up a slightly different problem so many people have. A single verse out of context can be interpreted as meaning (or used to suggest) something other than what was meant. Context is important. Further, on that subject, even a whole passage might seem odd unless we know the customs of the people for whom the book was written. The epistles were each written to specific peoples, with their own unique customs and circumstances.
An example that comes to mind is 1Corinthians 14:34 that says women should not speak in church. It was the custom, at that time and place, for all the men to sit on one side and all the women on the other. If a woman wanted to say something to her husband, she would have had to yell across the room. Which would be distracting, to say the least. Another example, and I cannot remember where it is nor find it right now, says men should not were their hair long and women shouldn't cut their hair short. Well, I think Jesus had long hair, and John the Baptist definitely did, so that doesn't make any sense unless you look at the customs of the area. Homosexuality was rampant in that city. A man wearing his hair long, or a woman with hers short, was advertisement of his or her sexual orientation. I believe it was an admonition against homosexuality, and not mere style advice.
I forgot to address the "Cleanliness is next to Godliness" saying. I guess it was a good way to get kids to wash behind their ears LOL. One possibility is Titus 2 which speaks to young women about their duties, one of which is keeping her home. Being a slovenly housekeeper would go against that, and make her not a Godly woman. Another possibility is the Law given in Leviticus, many of the rules are related to cleanliness. These were for health reasons - God knew all about pathogens and hygiene. But these were the law, and following the law, prior to the age of Grace, is what got you close to God.
Disclaimer: These are all just my opinions and guesses. If they aren't of my own invention and I heard these theories somewhere, I can't possibly give citations, so it doesn't count. It makes sense to me, and appears to be in accord with the Bible. If anything I said doesn't make sense to you, discard it. If anything I said is counter to what the Bible says, definitely discard it and please correct me (lovingly)
Be well,
~A