Romans 15:13

Now the God of hope, etc. - Ὁ δε Θεος της ελπιδος, May the God of this hope - that God who caused both Jews and Gentiles to hope that the gracious promises which he made to them should be fulfilled; and who, accordingly, has fulfilled them in the most punctual and circumstantial manner;

Fill you with all joy - Give you true spiritual happiness; peace in your own hearts, and unity among yourselves; in believing not only the promises which he has given you, but believing in Christ Jesus, in whom all the promises are yea and amen.

That ye may abound in hope - That ye may be excited to take more enlarged views of the salvation which God has provided for you, and have all your expectations fulfilled by the power of the Holy Ghost, enabling you to hope and believe; and then sealing the fulfillment of the promises upon your hearts.

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 ye may abound ... - That your hope may be steadfast and strong.

Through the power ... - 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.

15:13 Now the God of hope - A glorious title of God, but till now unknown to the heathens; for their goddess Hope, like their other idols, was nothing; whose temple at Rome was burned by lightning. It was, indeed, built again not long after, but was again burned to the ground.