The premise of this chapter is that the potential of poetry as a means of cross-disciplinary learning can only be fully realized if the specific sustainability of the poetic texts is taken into consideration. Using Theodor W. Adorno’s often misinterpreted statement about poetry after Auschwitz as a starting point, this chapter elaborates on poetry as a certain subjective way of reaching the objective. This relation between the subjective and the objective also indicates that there can be different ways of reading a poem in a cross-disciplinary context—concentrating either on the message of the content or on the message of the form. As an example of these different kinds of reading the author uses the popular and often anthologized poem “Goblin Market” by Christina Rossetti. The argument here is that the truth of poetry is never fixed and that the ability to produce different readings can function as a “messenger” between the subjective and the objective realms, and thus between different epistemologies and subject contents.