Ephesians 1:15-17

For this reason, because I have heard of your faith in the Lord Jesus and your love toward all the saints, I do not cease to give thanks for you, remembering you in my prayers,

(v15-16, ESV)

The reason is found in what Paul said earlier. Paul was speaking about how God had a plan before the creation of the world. The plan was carried out by Jesus and his death on the cross. That through him we might be forgiven and redeemed to God. In addition, God was well pleased to do this. It wasn't something he was unhappily obligated to, but something he was glad to do. So, Paul begins this paragraph referring to what he said earlier. Also, this first verse adds more, which is their faith in Jesus and love towards each other. This seems to be Paul's proof and evidence of God's working in them and their hearts. Putting these all together creates in Paul a great thankfulness. There is an amazing plan which God is happy to set forth and those who Paul is writing to are participating and benefiting from this saving grace. Paul is so filled with joy for them that he cannot stop giving thanks for them and remembering them in his prayers. Likewise, we should be thankful for each other, knowing full well God's plan and it's working in and through other believers.

that the God of our Lord Jesus Christ, the Father of glory, may give you a spirit of wisdom and of revelation in the knowledge of him,

(v17, ESV)

Paul's prayer for them is for wisdom and revelation of knowledge. He is glad for them and their true faith. However, he wishes for more for them. He wants them not just to have faith, but to be wise and grow in their knowledge of God. The revelation in the knowledge of him is the revealing of knowledge of God. Paul's prayer is to God, so he's asking that God would reveal knowledge to them about himself.

Let us be thankful for one another and pray for one another.