Albert Barnes Commentary Romans 15:13

"Now the God of hope fill you with all joy and peace in believing, that ye may abound in hope, in the power of the Holy Spirit." — Romans 15:13 (ASV)

Now the God of hope. The God who inspires, or produces, the Christian hope.

All joy and peace. Romans 14:17. If they were filled with this, there would be no strife and contention.

In believing. The effect of believing is to produce this joy and peace.

That you may abound, etc. That your hope may be steadfast and strong.

Through the power, etc. By means of the powerful operation of the Holy Spirit. It is by his power alone that the Christian has the hope of eternal life. See Ephesians 1:13,14; Romans 8:24.