KJV:
But ye know the proof of him, that, as a son with the father, he hath served with me in the gospel.
NASB:
But you know of his proven worth, that he served with me in the furtherance of the gospel like a child serving his father.
KJV:
Knowing that of the Lord ye shall receive the reward of the inheritance: for ye serve the Lord Christ.
NASB:
knowing that from the Lord you will receive the reward of the inheritance. It is the Lord Christ whom you serve.
KJV:
For they themselves shew of us what manner of entering in we had unto you, and how ye turned to God from idols to serve the living and true God;
NASB:
For they themselves report about us what kind of a reception we had with you, and how you turned to God from idols to serve a living and true God,
KJV:
And they that have believing masters, let them not despise them, because they are brethren; but rather do them service, because they are faithful and beloved, partakers of the benefit. These things teach and exhort.
NASB:
Those who have believers as their masters must not be disrespectful to them because they are brethren, but must serve them all the more, because those who partake of the benefit are believers and beloved. Teach and preach these principles.
KJV:
For we ourselves also were sometimes foolish, disobedient, deceived, serving divers lusts and pleasures, living in malice and envy, hateful, and hating one another.
NASB:
For we also once were foolish ourselves, disobedient, deceived, enslaved to various lusts and pleasures, spending our life in malice and envy, hateful, hating one another.