These lines repeat Shakespeare's themes of fading beauty and what makes love true, present in the Beautiful Youth and the Dark Mistress sonnets respectively. Under the theme fading beauty, Henry V remarks on how his complexion does not matter, for it will inevitably fade and she should find something in a man (him) that will last. This is similar to the idea of writing of one's love being eternal while beauty fades, in the BY. As for what makes love true, similarly to how the speaker of the DM sonnets laments that his lover is not attractive, but he loves her none the less, making their love true, this is how Henry V suggests he is the perfect man. He is not attractive, but his heart is good, meaning that if Katherine chooses to accept his love, she will know that his love is true.