Only a heart. | not two.

仅一心。 | 不二情。

youdao

The reason to develop a capacity for empathy, and then exercise it regularly, is that only a heart strengthened by this kind of understanding can effectively deliver the oxygen of the spirit: love.

要建立并时常锻炼一种移情的能力的理由是：只有一颗被这样的理解所强化后的心才能有效地释放出精神的氧气：爱。

youdao

youdao

Brandon Williams was only a fatal heart attack.

VOA: standard.2009.12.12

"As a human being and particularly as a citizen of the only country ever to suffer such a nuclear catastrophe, I believe with all my heart and soul that these horrific weapons must be eliminated."

VOA: standard.2010.08.06

You may feel that it has no terms of its own, only a good heart and the will to please.

NEWYORKER: Mississippi Masala

Emphasis on mild--Cheney's episode qualified as a heart attack only under a stringent new definition adopted by the American Heart Association about a year ago.

CNN: Heart Murmurs

As a singer, Gene Pitney recorded Only Love Can Break a Heart and The Man Who Shot Liberty Valance.

NPR: Rock 'n' Roll Singer Gene Pitney