The lyrics to Engelbert Humperdinck's "Love Can Fly" are centered around the theme of love and the struggle that comes with it. The opening line says "Wise men say only fools rush in," which means that only foolish people fall in love quickly without getting to know the other person. It's a cautionary warning to take things slowly and not make decisions impulsively. However, the singer goes against this advice and admits to having fallen in love with someone, despite the risks.

The second verse goes on to ask if staying and continuing to love this person would be considered a sin. This line suggests that the love may be forbidden or frowned upon by others, but the singer cannot help their feelings. The chorus repeats the sentiment that the singer cannot help falling in love with this person, likening it to a river flowing towards the sea. The image of a river represents the natural course of things, and how some things are meant to be. The singer is accepting that their love is natural and meant to happen, even if it goes against conventional wisdom.

The bridge of the song brings a sense of commitment. The singer offers their whole life to this person and invites them to take their hand, emphasizing the depth of their love. The final chorus repeats the sentiment that the singer cannot help falling in love with this person, which indicates that this love is unwavering and sincere.