"And this is my prayer:
This is my prayer for all of you as well...
that your love may abound more and more in knowledge and depth of insight,
This says to me that love, true love, biblical love, is more than just an emotional response; that love is sitting down and going through a process of reasoning and attempting to gain knowledge, insight, and wisdom. This insight is what enables us to make right decisions. It allows us to think about the details of our circumstances, see how God is truly working in and through our situation, and then come to conclusions that will bring honor and glory to God. That is why the rest of the prayer goes like this...
so that you may be able to discern what is best
There is always a huge difference between what is good and what is best. There are always things that are good, but they are not necessarily the best for us. For example, ice cream is good, chocolate sundaes are REALLY GOOD, but I'm not sure that these are the best things for us. Likewise, many choices we make may be good choices, but they just might not be the best choices.
and may be pure and blameless until the day of Christ, filled with the fruit of righteousness that comes through Jesus Christ -- to the glory and praise of God.