The poem
If the dull substance of my flesh were thought, Injurious distance should not stop my way; For then despite of space I would be brought, From limits far remote, where thou dost stay. No matter then although my foot did stand Upon the farthest earth removed from thee; For nimble thought can jump both sea and land As soon as think the place where he would be. But, ah, thought kills me that I am not thought, To leap large lengths of miles when thou art gone, But that, so much of earth and water wrought, I must attend time's leisure with my moan, Receiving nought by elements so slow, But heavy tears, badges of either's woe.