1:9 {3} And this I pray, that your love may abound yet more and more in knowledge and [in] all judgment;

(3) He shows what thing we ought to chiefly desire, that is, first of all that we may increase in the true knowledge of God (so that we may be able to discern things that differ from one another), and also in charity, that even to the end we may give ourselves to truly good works, to the glory of God by Jesus Christ.

1:9 And this I pray, that your love may abound yet more and more. Not that their love for him should abound more, but

in knowledge and [in] all judgment. With the increase of their love there might be fuller knowledge and wiser judgment.

1:9 And this I pray, that your love - Which they had already shown. May abound yet more and more - The fire which burned in the apostle never says, It is enough. In knowledge and in all spiritual sense - Which is the ground of all spiritual knowledge. We must be inwardly sensible of divine peace, joy, love; otherwise, we cannot know what they are.

1:8-11 Shall not we pity and love those souls whom Christ loves and pities? Those who abound in any grace, need to abound more. Try things which differ; that we may approve the things which are excellent. The truths and laws of Christ are excellent; and they recommend themselves as such to any attentive mind. Sincerity is that in which we should have our conversation in the world, and it is the glory of all our graces. Christians should not be apt to take offence, and should be very careful not to offend God or the brethren. The things which most honour God will most benefit us. Let us not leave it doubtful whether any good fruit is found in us or not. A small measure of Christian love, knowledge, and fruitfulness should not satisfy any.