Although it appears that Sonnet 154 follows traditional Shakespearean sonnet form, Paul Ramsey wrote in The Fickle Glass: A Study of Shakespeare's Sonnets that Sonnet 154 is a rare example of a situation when Shakespeare breaks away from the form he had established in his last 153 sonnets.
Although it appears that Sonnet 154 follows the traditional Shakespearean sonnet form, Paul Ramsey suggests that Sonnet 154 is a rare instance where Shakespeare departs from the form he had previously used in his last 153 sonnets.