so that you may be able to test and prove what is best and may be pure and blameless for the day of Christ,
10 That ye may approve the things that are Here we have a definition of Christian wisdom — to know what is advantageous or expedient — not to torture the mind with empty subtleties and speculations. For the Lord does not wish that his believing people should employ themselves fruitlessly in learning what is of no profit: From this you may gather in what estimation...
Literally, "With a view to your proving (and so approving and embracing) the things that excel" (Rom 2:18); not merely things not bad, but the things best among those that are good; the things of more advanced excellence. Ask as to things, not merely, Is there no harm, but is there any good, and which is the best? sincere--from a Greek root. Examined in the sunlight and found pure.
That ye may approve things that are excellent,.... Or "try things that differ". There are some things that differ one from other; as morality and grace, earthly things, and heavenly things, carnal and spiritual, temporal and eternal things, law and Gospel, the doctrines of men, and the doctrines of Christ; all which differ as much as chaff and wheat, as gold, silver, precious stones, and wood, hay, stubble.