Maria Teresa had bespoken his tenderness for her in a letter which she wrote to him on the day on which her daughter left Vienna, and which has often been quoted as a composition worthy of her alike as a mother and as a Christian sovereign; and as admirably calculated to impress the heart of her new son-in-law by claiming his attachment for his bride, on the ground of the pains which she had taken to make her worthy of her fortune.
"Your bride, my dear dauphin, has just left me.

I do hope that she will cause your happiness.

I have brought her up with the design that she should do so, because I have for some time forseen that she would share your destiny.
"I have inspired her with an eager desire to do her duty to you, with a tender attachment to your person, with a resolution to be attentive to think and do every thing which may please you.

I have also been most careful to enjoin her a tender devotion toward the Master of all Sovereigns, being thoroughly persuaded that we are but badly providing for the welfare of the nations which are intrusted to us when we fail in our duty to Him who breaks sceptres and overthrows thrones according to his pleasure.
"I say, then, to you, my dear dauphin, as I say to my daughter: 'Cultivate your duties toward God.

Seek to cause the happiness of the people over whom you will reign (it will be too soon, come when it may).