Nature
The poetry of Edward Thomas talks about a variety of universal themes. One of the most prominent themes in his poetry is that of nature. He delineates elements of nature, but not in a conventional way. He He talks about duality in nature- the softness or the calmness as well as the fierceness. These two elements manifest in "As the Clouds That Are So Light" and "April". There is extensive use of nature imagery to talk about the beauty of nature in both these poems.
Love
Another theme that manifests time and again in the poet's works is that of love. He writes about love in a myriad of ways. In fact, in an instance, it has seemed like he has talked about love and union in nature. In "An you, Helen", he talks about giving his love all he can and himself too, if he could. He exoticizes the woman in a way, and in this instance, talks about conventional love.
Womanhood
This theme is also very important in Edward Thomas's works. He writes beautifully but conventionally about women. In "And you, Helen", he seems to caricature a conventional but beautiful woman, even though he does so in an aesthetically pleasing manner.