this troubles me

How Love came in, I do not know, 

Whether by th' eye, or eare, or no; 

Or whether with the soule it came 

(At first) infused with the same; 

Whether in part ’tis here or there, 

Or, like the soule, whole everywhere; 

This troubles me: but I as well 

As any other this can tell: 

That when from hence she does depart, 

The out-let then is from the heart. 

 

[Robert Herrick {1591-1674} 'Of Love. A Sonet', from Love Songs and Sonnets, in Everyman’s Library Pocket Poets]