Non pas que nos paroles ne suffisent pas, mais dans ce cas, compte tenu des enjeux importants, il fallait que j'obtienne ces garanties pour pouvoir être absolument certain que nous allions faire notre travail jusqu'au bout, que nous allions assumer notre devoir jusqu'à la toute fin.
Not that our word is not enough, but in this case, in view of the importance of this matter, I simply had to obtain these guarantees in order to be absolutely certain that we would do our work to the end, that we were going to assume our responsibilities right to the end.