True knowledge increases true love. Certainly, our love of God grows through increased knowledge of Him. Likewise, our love for others increases as we gain more knowledge concerning God's love for us. When we truly realize how much God loves us, in spite of our failings, we are better prepared to love others. Also, love that is based on knowledge is right love, loving the right things, for the right reasons, in the right way.
Discernment is ever our problem.
We need this greatly. We need to learn how to make the right choices and how to use our time in the right ways. We need, through knowledge, to discern whose teaching to follow. We need to be able to discern how best to serve the Lord. We are constantly faced with decisions and so, in each decision, we need to be able to choose what would most please and honor God.