Sonnet 4 by Shakespeare

Sonnet 4 is another one of Shakespeare's procreation sonnets.

Synopsis and analysis
Shakespeare urges the man to have children, and thus not waste his beauty by not creating more children. To Shakespeare, unless the male produces a child, or “executor to be", he will not have used nature's beauty correctly. Shakespeare uses business terminology ("niggard", "usurer", "sums", "executor", "audit", "profitless") to aid in portraying the young man's beauty as a commodity, which nature only "lends" for a certain amount of time.
 * Nature's bequest gives nothing but doth lend,
 * And being frank she lends to those are free

Shakespeare finishes with a warning of the fate of he who does not use his beauty:
 * Thy unused beauty must be tomb'd with thee,
 * Which, used, lives th' executor to be.