KJV:
And they that use this world, as not abusing it: for the fashion of this world passeth away.
NASB:
and those who use the world, as though they did not make full use of it; for the form of this world is passing away.
KJV:
What is my reward then? Verily that, when I preach the gospel, I may make the gospel of Christ without charge, that I abuse not my power in the gospel.
NASB:
What then is my reward? That, when I preach the gospel, I may offer the gospel without charge, so as not to make full use of my right in the gospel.