'Begin, my tongue, some heavenly theme' is a hymn by Isaac Watts, published as Hymn 69 in Book 2 of his Hymns and Spiritual Songs.
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Text and translations
1 Begin, my tongue, some heavenly theme,
And speak some boundless thing;
The mighty works, or mightier name
Of our eternal king.
2 Tell of his wondrous faithfulness,
And sound his pow'r abroad;
Sing the sweet promise of his grace,
And the performing God.
3 Proclaim salvation from the Lord
For wretched dying men:
His hand has writ the sacred word
With an immortal pen.
4 Engrav'd as in eternal brass
The mighty promise shines,
Nor can the pow'rs of darkness rase
Those everlasting lines.
5 He that can dash whole worlds to death.
And make them when he please,
He speaks, and that almighty breath
Fulfils his great decrees.
6 His very word of grace is strong
As that which built the skies,
The voice that rolls the stars along
Speaks all the promises.
7 He said, Let the wide heav'n be spread,
And heav'n was stretch'd abroad;
Abrah'm, I'll be thy God, he said,
And he was Abrah'm's God.
8 O, might I hear thine heav'nly tongue
But whisper, Thou art mine,
Those gentle words should raise my song
To notes almost divine.
9 How would my leaping heart rejoice
And think my heav'n secure!
I trust the all-creating voice,
And faith desires no more.
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