Most Relevant Verses
Let no foul or polluting language, nor evil word nor unwholesome or worthless talk [ever] come out of your mouth, but only such [speech] as is good and beneficial to the spiritual progress of others, as is fitting to the need and the occasion, that it may be a blessing and give grace (God's favor) to those who hear it.
Do not give that which is holy (the sacred thing) to the dogs, and do not throw your pearls before hogs, lest they trample upon them with their feet and turn and tear you in pieces.
You are of your father, the devil, and it is your will to practice the lusts and gratify the desires [which are characteristic] of your father. He was a murderer from the beginning and does not stand in the truth, because there is no truth in him. When he speaks a falsehood, he speaks what is natural to him, for he is a liar [himself] and the father of lies and of all that is false.
But when he saw many of the Pharisees and Sadducees coming for baptism, he said to them, You brood of vipers! Who warned you to flee and escape from the wrath and indignation [of God against disobedience] that is coming?
I appeal to you, brethren, to be on your guard concerning those who create dissensions and difficulties and cause divisions, in opposition to the doctrine (the teaching) which you have been taught. [I warn you to turn aside from them, to] avoid them.
Until they were filled (permeated and saturated) with every kind of unrighteousness, iniquity, grasping and covetous greed, and malice. [They were] full of envy and jealousy, murder, strife, deceit and treachery, ill will and cruel ways. [They were] secret backbiters and gossipers,
If you are censured and suffer abuse [because you bear] the name of Christ, blessed [are you -- "happy, fortunate, to be envied, with life-joy, and satisfaction in God's favor and salvation, regardless of your outward condition], because the Spirit of glory, the Spirit of God, is resting upon you. On their part He is blasphemed, but on your part He is glorified.
One of their [very] number, a prophet of their own, said, Cretans are always liars, hurtful beasts, idle and lazy gluttons.
Then taking the Twelve [apostles] aside, He said to them, Listen! We are going up to Jerusalem, and all things that are written about the Son of Man through and by the prophets will be fulfilled. For He will be handed over to the Gentiles and will be made sport of and scoffed and jeered at and insulted and spit upon. They will flog Him and kill Him; and on the third day He will rise again.
But since they kept opposing and abusing and reviling him, he shook out his clothing [against them] and said to them, Your blood be upon your [own] heads! I am innocent [of it]. From now on I will go to the Gentiles (the heathen).