At 40s....are you talking about the wind chimes?The oboe (complemented by keyboards) which begins the song (from 0 to 14s) has its counterpart with the ensuing flute (begin at 1:11 to 1:24s).
What is that beautiful instrument coming in at 40 sec ? Strings are subdued in most of the first half.
There is a modulation, a progression, of the flute (1:27-1:39) to a modulated counterpart of the strings (1:40-1:47).
Full string ensemble really begins after 1:47.
In any event, there is a lot going on, arrangement-wise, in this song. Lots to grab hold of.
The guitar break is divine (2:27-2:55). The drums are tasteful without being intrusive. Same with choir (after 2:55).
The repeat of "... can't help myself I fall in love with you..." (3:20 then, 3:28) is a fitting conclusion to the song.
I feel that this arrangement is one of the best I have ever encountered in a pop song.