He goes on to define love by what it does not do, change. Affirm that love remains constant, even though people and circumstances may present inconsistencies; love never dies, even if someone tries to destroy it. Rather than being something that comes and goes, love is eternal and unchanging; so much so that the poet compares it to the North Star, which never moves in the sky and guides lost ships until they return. Using the North Star as a metaphor describes love because the reason we love is sometimes mysterious and perhaps incomprehensible, even if we can trace its location. This notion contrasts with the popular belief that falling in love can often be scary, often creating feelings of uncertainty and doubt. Shakespeare does a good job of wasting no time in saying that love is the most reliable entity an individual can have.