KJV:
For this cause also thank we God without ceasing, because, when ye received the word of God which ye heard of us, ye received it not as the word of men, but as it is in truth, the word of God, which effectually worketh also in you that believe.
NASB:
For this reason we also constantly thank God that when you received the word of God which you heard from us, you accepted it not as the word of men, but for what it really is, the word of God, which also performs its work in you who believe.
KJV:
For this we say unto you by the word of the Lord, that we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep.
NASB:
For this we say to you by the word of the Lord, that we who are alive and remain until the coming of the Lord, will not precede those who have fallen asleep.
KJV:
Wherefore comfort one another with these words.
NASB:
Therefore comfort one another with these words.
KJV:
That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand.
NASB:
that you not be quickly shaken from your composure or be disturbed either by a spirit or a message or a letter as if from us, to the effect that the day of the Lord has come.
KJV:
Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle.
NASB:
So then, brethren, stand firm and hold to the traditions which you were taught, whether by word of mouth or by letter from us.
KJV:
Comfort your hearts, and stablish you in every good word and work.
NASB:
comfort and strengthen your hearts in every good work and word.
KJV:
Finally, brethren, pray for us, that the word of the Lord may have free course, and be glorified, even as it is with you:
NASB:
Finally, brethren, pray for us that the word of the Lord will spread rapidly and be glorified, just as it did also with you;
KJV:
And if any man obey not our word by this epistle, note that man, and have no company with him, that he may be ashamed.
NASB:
If anyone does not obey our instruction in this letter, take special note of that person and do not associate with him, so that he will be put to shame.