He claims, in Shakespearean rhyme, that his companion will be immortalized. The phrases in his poetry will ensure that his friend's beauty endures. As Shakespeare says in Sonnet 55, "you live in this [the poetry] and dwell in lovers' eyes till the judgment that your self arises." Shakespeare also promises that his friend will be loved after he dies. In Sonnet 37, he writes, "The sun shall not go down while you are loving anyone else but me." This means that his love for others will not cause night to come sooner or make the sun hide its light during those times when he is with others. Shakespeare also promises that his friend will be missed once he is gone. In Sonnet 144, he tells the mistress who has replaced him that "By thy sweet smile I know that thou art true" and that "In parting from thee now, I fear I may not do enough praise". He wants her to know that even though he is gone, people will miss hearing about their relationship. Finally, Shakespeare assures his friend that he is better off without her/him. In Sonnet 18, he says that he is glad that she refused his initial offer of marriage because "Thou shalt die an old death by me". He believes that since they weren't meant to be together, it would be wrong for them to marry.