It felt like the most sincere thing he had ever said.

That promise was the most sincere response she'd ever given Nick.

It was the most sincere statement the Captain had ever heard.

It was the most sincere apology I'd ever received in my life.

To these and many others, my most sincere thanks.

To the entire family, we send our most sincere sympathy.

And so, after months of total silence, she has put together the most sincere question a human being can ask.

For now though, I offer it my most sincere congratulations.

Once again, I send my most sincere wishes for your presidency.

"I'm here to offer our most sincere apologies for earlier tonight."