Sonnet 113

My mind has replaced my eye's function: everything I see transforms into your image, rendering my vision unreliable.

Original
Modern
1 Since I left you, mine eye is in my mind,
Since leaving you, my vision exists only inside my mind,
2 And that which governs me to go about,
And that which governs me to move around
3 Doth part his function, and is partly blind,
Splits its function and is partly blind,
Wordplay: “part his function”

The eye both 'departs' (leaves) and divides ('parts') its function; it's a pun suggesting both abandonment and fragmentation.

4 Seems seeing, but effectually is out:
Seems seeing, but is effectively not working:
5 For it no form delivers to the heart
For it delivers no clear form to my heart
6 Of bird, of flower, or shape which it doth latch,
Of bird, of flower, or shape which it does catch,
7 Of his quick objects hath the mind no part,
Of his quick objects my mind has no part,
8 Nor his own vision holds what it doth catch:
Nor does his own vision hold what it captures:
Volta The volta shifts from describing the eye-mind split to naming its cause: you have become the obsessive replacement for all visual input.
9 For if it see the rud’st or gentlest sight,
For if it sees the rudest or gentlest sight,
10 The most sweet favour or deformed’st creature,
The most sweet face or deformed creature,
11 The mountain, or the sea, the day, or night:
Whether it is an enormous peak, a vast body of water, bright sun, or complete darkness:
12 The crow, or dove, it shapes them to your feature.
A crow or a dove—my mind transforms them both into your likeness.
13 Incapable of more, replete with you,
Incapable of more, replete with you
Incapable of more, full of you,
14 My most true mind thus maketh mine untrue.
My most true mind makes my sight untrue.
The Eye-Mind Dissociation

Shakespeare presents a startling neurological crisis: the eye 'part[s] his function' and becomes 'partly blind' while simultaneously appearing to see. This isn't mere distraction but a fracture in perception itself. The eye delivers nothing to the heart; the mind intercepts all sensory data and replaces it with your image. The 'form' of external reality—bird, flower, mountain, day—becomes irrelevant.

The Final Paradox of Line 13-14

The concluding couplet contains the sonnet's deepest irony: the speaker's mind is 'most true' precisely because it is also 'untrue.' By being completely flooded with the young man's image, the mind achieves absolute fidelity to obsession—a perverse kind of constancy. Truth and falsehood collapse into each other when love has hijacked cognition entirely.

If this happened today

Like checking your phone every five minutes and seeing only one person's messages reflected everywhere—your dating app becomes their profile, your Instagram feed reshapes itself into their photos, your brain runs this filter so compulsively you stop trusting what you actually see.