The phrase Heaven meets Earth like a sloppy, wet kiss is found in a song titled "How He Loves" (see full set of lyrics here) which is currently used as a worship song in corporate worship settings. The particular line in question has, understandably, caused quite the controversy in Christian circles with advocates for both its inclusion and exclusion. An alternate version is sometimes used with the offensive portion of the lyric replaced by the words unforeseen kiss. For the purposes of this analysis, HME will refer to Heaven meets Earth, and SWK to sloppy, wet kiss.
As I see it, there are at least three issues with, or related to, this specific lyric:
I - Whether by design or by accident, the intended meaning of the lyric is vague and internally inconsistent. This, despite attempts by John Mark McMillan, the author, to define and explain the meaning of the words he used.
II - Much of the current corporate worship singing methodology, found in the contemporary evangelical church in America, is inconsistent with foundational corporate worship practice. The modern practice, in the West, of interjecting the personal into the corporate, reflects secular influences.
III - Those who hear, read, or sing the song, whom I will refer to as recipients of the song, readily misinterpret the author's intended meaning in both the HME and SWK lyrics.