Filipenses 1:9

That your love may abound more and more in knowledge. — The original verb here signifies to “overflow,” a sense which our word “abound” properly has, but has in general usage partially lost; and St. Paul’s meaning clearly is that love shall not only primarily fill the heart, but “overflow” in secondary influence on the spiritual understanding. (1) The “knowledge” here spoken of is the knowledge gradually rising to perfection, so constantly alluded to in these Epistles. (See Efésios 1:17, and Note there.) Since it is clearly a personal knowledge of God in Christ, it may be gained, under His inspiration, by one of many processes, by thought, by practice, by love, by devotion, or, perhaps more properly, by some or all of these combined. Here St. Paul singles out the way of love — the enthusiasm of love to God and man which he knew that the Philippians had — and prays that it may overflow from the emotional to the intellectual element of their nature, and become, as we constantly see that it does become in simple and loving characters, a means of spiritual insight, in “knowledge and all judgment,” or rather, all perception. (2) The word “perception” properly applies to the senses, and seems here to signify the insight which recognises a truth as the eye recognises an object. In the same sense (Hebreus 5:14) Holy Scripture speaks of those who “by use have their senses exercised to discern good and evil.” In fact, the “perception” here spoken of differs from knowledge in dealing not with general principles, but with concrete examples and questions. (3) Accordingly he connects with it, as a direct consequence, the power of “approving” or “testing” the things that are excellent. Now the word here translated “excellent” carries with it the idea of distinctive and relative excellence, conspicuous amidst what is either evil or defective. To “test” is obviously first to distinguish what is the best, and then by trial to prove its absolute goodness. Clearly the process may be applied either speculatively to truths or practically to duties. In Romanos 2:18, where exactly the same phrase is used, the latter application is made.