"Ow'st" in line ten can carry two meanings, each common at the time: "ownest" and "owest". "Owe", in Shakespeare's day, was sometimes used as a synonym for "own". However, "owest" conveys the idea that beauty is something borrowed from nature—that it must be paid back. In this interpretation, "fair" can be a pun on "fare", or the fare required by nature for life's journey. Other scholars have pointed out that this borrowing and lending theme within the poem is true of both nature and humanity. Summer, for example, is said to have a "lease" with "all too short a date". This monetary theme is common in many of Shakespeare's sonnets, as it was an everyday theme in his budding capitalistic society.