Billboard said that "The melodic arrangement enhances the lyrics while the tasty orchestration and commanding vocal maximizes the love ballad's effectiveness."[4]Record World called it a "dreamy ballad" and said that "a great title hook, enchanting vocals & keyboards make a perfect radio record."[5]
The song ranked at number 80 on Billboard's "Greatest Songs of All Time".[13]Classic Rock History critic Brian Kachejian rated it as Foreigner's 7th best song, particularly praising the "great keyboard line played at the song’s intro and in between verses."[14]
It just came out. I had no idea what it meant, but it got to the point where I couldn't even be in the studio when we were recording it sometimes. It left such a deep impression on me. It's the kind of song that the pen does the writing, and you don't even know where it came from. But I feel that it's stuff that's floating around at times, and you have to grasp it. It's kind of flying around in the air, and you just have to be open enough to let that flow through you.[15]
In his autobiography, Lou Gramm tells of a beautiful, mysterious woman who appeared in the control room when he was recording his vocal and gave him the inspiration to deliver the stirring take that was better than he has ever sung the song. He writes that this ephemeral beauty vanished, and he has never discerned her identity.[16]
The introduction was created by Thomas Dolby using a Minimoog synthesizer. Dolby remembers Mutt Lange leaving him to his own devices in the studio one night, "like a kid locked in a toy shop" to develop the intro to the song with six tracks of the multitrack available.[17] As a result, he made the "Eno-esque" ambient drones. These were sustained single notes in a minor scale, each recorded on a single track of a (separate) 2" multitrack tape; Dolby "played" the faders on the mixing console at Electric Lady Studios (by fading in and out the sustained notes) like a mellotron and bounced down the result onto two tracks.[18] Drummer Dennis Elliott likened the intro to "massage music" but Jones liked it and it stuck.