“I love you. Most ardently.”

"No, it is not you I love so ardently..." (1841)
Poems

Source: Pride and Prejudice

The Writings of Marguerite Bourgeoys, p. 187

Variant: In vain I have struggled. It will not do. My feelings will no longer be repressed. You must allow me to tell you how ardently I admire and love you.
Source: Pride And Prejudice

at Daytona 500, , quoted in [2012-02-26, Mitt Romney at Daytona 500: ‘I have some great friends that are NASCAR team owners’, Philip, Rucker, Election 2012, The Washington Post, http://www.washingtonpost.com/blogs/election-2012/post/mitt-romney-trades-campaign-trail-for-daytona-500/2012/02/26/gIQAMsHpcR_blog.html, 2012-07-03, ,] and * 2012-02-27
The Daily Show
Comedy Central
http://www.thedailyshow.com/watch/mon-february-27-2012/indecision-2012---how-is-it-that-mitt-romney-hasn-t-crushed-this-guy-already-
2012-07-03
asked whether he follows NASCAR
2012

How to Succeed at Vampire Slaying and Keep Your Soul (2005)
Context: Children are the world's most ardent traditionalists. They like things stable and categorized. They want to know what girls can do and what girls can't do. Television, like it or not, teaches them a lot of these rules.

Book II, ch. 4 (trans. Constance Garnett)
The Elder Zossima, speaking to Mrs. Khoklakov
The Brothers Karamazov (1879–1880)
Context: "It's just the same story as a doctor once told me," observed the elder. "He was a man getting on in years, and undoubtedly clever. He spoke as frankly as you, though in jest, in bitter jest. 'I love humanity,' he said, 'but I wonder at myself. The more I love humanity in general, the less I love man in particular. In my dreams,' he said, 'I have often come to making enthusiastic schemes for the service of humanity, and perhaps I might actually have faced crucifixion if it had been suddenly necessary; and yet I am incapable of living in the same room with any one for two days together, as I know by experience. As soon as any one is near me, his personality disturbs my self-complacency and restricts my freedom. In twenty-four hours I begin to hate the best of men: one because he's too long over his dinner; another because he has a cold and keeps on blowing his nose. I become hostile to people the moment they come close to me. But it has always happened that the more I detest men individually the more ardent becomes my love for humanity.'"

Hayne's Speech on Mr. Foot's Resolution, January 21, 1830, page 16.