"Praise to our gracious and merciful God, our strength."
"Laudamus ad Dei comis et miserecordis, fortibus nostris."
Let's start with "Praise". You have translated it with the Latin for "We
praise". If that was your intention, good. Other ways include
-- The noun "Praise"
-- "Praise" as an imperative
-- "Let us praise"
If you want to use the noun Laus
, then the form of Deus
to use is Deo
(without the preposition).
If you want to use one of the verb forms, then use Deum
as it will be the
As for "gracious and merciful", I would follow the example of the Latin
Vulgate bible and use the adjective clemens
for "gracious". So:
<noun> Deo clementi et misericordi
<verb> Deum clementem et misericordem
I would use fortitudo
for "strength". It should agree in case with Deo
Deo . . . fortitudini nostro
Deum . . . fortitudinem nostrum