It is impossible to understand how Kelen settled on the diverse subjects he has written on between the years 1978 to 2019. Regardless, the poems presented in Love's Philosophy are given the same imaginative, romantic treatment—be it the great outdoors or a video game. Kelen's vigorous style is much like his 'Leech'— it goes for the jugular. 

'The 47 poems in Love’s Philosophy range across 42 years of Kelen’s career. Like the rest of his poetry they are clever, quirky, often sardonic and occasionally opaque (at least for a lazy reader). Although the quality may vary a little, each “sonnet-like creature” is worthy of close and repeated inspection.' — Sydney Morning Herald