The speaker gives the beloved a blank book and mirror, tools to track time's theft and preserve memory against inevitable decay.
Sonnet 77 offers three technologies of resistance. The mirror is confrontation—it forces the beloved to see time's ravages. The dial is measurement—it makes the invisible (time) visible through the shadow's movement. The book is preservation—it transforms fugitive thoughts into permanent record. Together, these are not weapons against mortality (which is impossible) but tools for consciousness. By seeing the wrinkles, tracking the hours, and recording the mind, the beloved gains agency. The alternatives—denying the wrinkles, ignoring time's passage, forgetting thoughts—lead to oblivion. The speaker is recommending a kind of active memorialization of the self, a way of keeping oneself alive through vigilance and documentation.
Lines 9-12 perform a subtle magic: what the mind cannot hold alone can be held in external form. The 'children nursed, delivered from thy brain' are thoughts that, when written down, take on a new existence. They are born again into the book. This suggests that the self is not a unitary thing contained in the body but something that can be externalized, archived, and encountered anew. When the beloved reads their own recorded thoughts, they meet themselves as a stranger ('to take a new acquaintance of thy mind'). The blank book becomes a mirror and a monument simultaneously—a place to see and to be seen, to know and to be known. Time steals the living self, but the written self persists and renews itself with each reading.
A gift of a fancy journal and nice mirror, accompanied by instructions: 'Look at yourself. Write down your thoughts before they disappear. Watch time in real time. These tools let you catch yourself.' It's both practical and philosophical—a way of saying: 'Aging is coming for you. The best defense is mindfulness and recording. Keep yourself alive by documenting yourself.'