"I truly admire" is correct and usable in written English. This phrase is often used to express admiration for someone or something. For example, "I truly admire the courage of those soldiers who put their lives on the line to defend our country."
I continue to have my beloved Amanda Keeler types amongst those I consider "good acquaintances," whom I truly admire.
"I truly admire the courage of a school that would produce a play like this," he said.
The artists I truly admire and am inspired by all harness the healthier aspects of perfectionism to keep learning and growing and to do good work.
I truly admire all of you that have been able to juggle your career and family and do not envy what a challenge it is trying to do each well.
"A person I truly admire and why".
You are someone I truly admire.
I truly admired her for her individuality and incredible spirit.
The first films I truly admired were French ones, like Henri-Georges Clouzot's "The Raven" [1943] and Marcel Carné's "The Devil's Envoys" [1942].
I didn't know Swartz nearly well enough even to form an opinion about what drove him to do this; I had a handful of exchanges with him online in which we said nice things about each other's work and I truly admired him.
My heart goes out to them and their families whose strength and smiles were something I truly admired.
As a believer in God myself, I truly admired the passion she happily expressed for her own faith.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK