I cannot think that thou shouldst pass away

I cannot think that thou shouldst pass away,
Whose life to mine is an eternal law,
A piece of nature that can have no flaw,
A new and certain sunrise every day:
But, if thou art to be another ray
About the Sun of Life, and art to live
Free from what part of thee was fugitive,
The debt of Love I will more fully pay,
Not downcast with the thought of thee so high,
But rather raised to be a nobler man,
And more divine in my humanity,
As knowing that the waiting eyes which scan
My life are lighted by a purer being,
And ask high, calm-browed deeds, with it agreeing.