Vous avez cherché: cui numquam satis gratias agere poterat (Latin - Anglais)

numquam satis
never enough

ego numquam satis
something i never quite

de libri numquam satis
never enough books

filius meus vobis gratias agere vult
i want to thank you my son

vere dignum et justum est , aequum et salutare nos tibi semper et ubique gratias agere
it is very meet, right, and we should always and everywhere to act freely

nos autem debemus gratias agere deo semper pro vobis fratres dilecti a deo quod elegerit nos deus primitias in salutem in sanctificatione spiritus et fide veritati
but we are bound to give thanks alway to god for you, brethren beloved of the lord, because god hath from the beginning chosen you to salvation through sanctification of the spirit and belief of the truth:

gratias agere debemus deo semper pro vobis fratres ita ut dignum est quoniam supercrescit fides vestra et abundat caritas uniuscuiusque omnium vestrum in invice
we are bound to thank god always for you, brethren, as it is meet, because that your faith groweth exceedingly, and the charity of every one of you all toward each other aboundeth;