Chapter 68: Oil and Water

Spoiler Warning: This analysis contains plot details through Chapter 68 of Rhythm of War. Read on only if you have reached this point in the book.

Summary

After a tense wait, Navani finally hears from Kaladin through the Sibling. He reports that he failed to reach the Oathgates but secured twelve full sets of spanreeds. The spanreeds function because the rubies’ spren have been corrupted to run on Voidlight. Kaladin also notes that breaking the node slowed his Stormlight healing. Navani reassures him that his role is to buy her time, and they discuss options for climbing the tower and warning Dalinar.

To aid Kaladin’s mobility, Navani covertly instructs the engineer Tomor to smuggle out his single-person lifting glove. Raboniel then summons Navani, revealing she has caught on to the scholars’ deliberate stalling. While walking the hallway, Navani sees Elhokar’s Shardblade Sunraiser being used against the pillar’s protective shield—a painful sight she endures without visible reaction.

Raboniel imposes new rules: Navani will work alone in a separate room. She then shows Navani the globe linked to the shield node—a Soulcasting fabrial that persuades air to act like solid glass. More critically, Raboniel presents a diamond containing Towerlight, a mixture of Stormlight and Lifelight unique to the Sibling. This discovery prompts a philosophical debate about whether opposites can mix. Navani corrects Raboniel’s assumption that oil and water are opposites, demonstrating an emulsion. Impressed, Raboniel agrees to supply corrupted gemstones for fabrial research. Navani later speaks with the Sibling, who still refuses to reveal the remaining node locations.

Key Events

  • Kaladin reports securing twelve spanreed sets, now functional via corrupted spren.
  • Navani tasks Tomor with sneaking out the lifting glove for Kaladin.
  • Raboniel separates Navani from her scholars to curtail stalling.
  • Navani sees Elhokar’s Blade being wielded by a singer warform against the shield.
  • Raboniel reveals the shield globe is a Soulcasting fabrial.
  • Towerlight is introduced as a union of Stormlight and Lifelight.
  • Navani teaches Raboniel about emulsifiers, challenging Singer philosophy.
  • The Sibling refuses to disclose node locations but remains in contact.

Character Development

Navani demonstrates layered leadership—managing Kaladin’s morale, orchestrating covert resistance, and engaging Raboniel as a scholarly equal. Her emotional discipline upon seeing Sunraiser underscores her resilience, while her scientific curiosity nearly distracts her from resistance until she consciously refocuses.

Kaladin remains burdened by self-doubt, viewing the lost node as a failure. Navani’s explicit validation visibly bolsters him, highlighting how crucial external reassurance remains for his psychological state.

Raboniel shows genuine scholarly humility when Navani disproves the oil-water opposites doctrine. Her willingness to adapt her worldview and negotiate concessions reveals a Fused who values knowledge over dogma, complicating her antagonistic role.

The Sibling persists in distrusting humans despite Kaladin’s sacrifices, equating human and singer exploitation. This stubborn neutrality continues to hamper the resistance effort.

Themes, Symbols, and Motifs

Oil and Water: The chapter title and central metaphor frame whether opposites can mix. Navani’s emulsion demonstration physically enacts the larger question—can humans and singers, Stormlight and Voidlight, coexist or combine?

Towerlight: The newly named hybrid Light symbolizes the Sibling’s dual heritage from Honor and Cultivation. Its near-extinction mirrors the tower’s failing defenses and the loss of ancient knowledge.

Light as Knowledge: Both Navani and Raboniel recognize that understanding the three Lights—and their potential mixtures—holds the key to power, unity, and possibly ending the war. Light becomes a metaphor for truth itself.

The Shield Globe: The Soulcasting fabrial that mimics solid glass reflects the theme of perception shaping reality—a concept central to the Surges and the tower’s lingering magic.

Why This Chapter Matters

This chapter deepens the uneasy intellectual alliance between Navani and Raboniel, establishing the scientific foundation for the book’s later breakthroughs in Light mechanics. It introduces Towerlight, advances the spanreed plotline, and seeds Navani’s scheme to equip Kaladin with mobility tools. The oil-water conversation is more than clever worldbuilding; it reframes the central conflict as potentially solvable through ingenuity rather than annihilation. Meanwhile, the Sibling’s continued stonewalling raises the stakes for the remaining nodes.

Study Questions and Answers

  1. Why does Navani correct Raboniel about oil and water, and what larger point does she make? Navani explains that oil and water are not opposites, just immiscible substances, and proves they can mix with an emulsifier. This challenges Singer philosophical doctrine and implicitly argues that Stormlight and Voidlight—and by extension humans and singers—might not be irreconcilable opposites either, but could coexist or combine with the right catalyst.

  2. What is Towerlight, and why is it significant? Towerlight is a mixture of Stormlight and Lifelight unique to the Sibling, who is the child of both Honor and Cultivation. Its existence proves that different forms of Light can be combined, suggesting other hybrid Lights may be possible. Its near-disappearance explains why the tower’s higher functions failed after the Recreance.

  3. How does Raboniel’s approach to Navani shift in this chapter? Raboniel moves from allowing Navani collective scholarly work to isolating her in a private room, attempting to redirect her talent toward genuine discovery rather than stalling. However, Raboniel also shows openness to learning—accepting Navani’s emulsion lesson and agreeing to supply corrupted gemstones—revealing a respect for Navani that goes beyond mere manipulation.

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