This is a list of quotes spoken by both the IsoDidact. For quotes by the Ur-Didact, see here.
Iris
- "There is no peace left. No place where the parasite cannot reach. You were right about it all. Let us hope the final measure is not too late.
- ...
- It's done. By my hands. The pyrrhic solution is ignited. All I have left is the quiet of space to lull me to sleep. I will dream of you.
- ...
- I feel no peril.
- ...
- No pain. No remorse. Is that normal?" - The Didact as he activates the Halo Array.
Halo 3 Terminals
- "You know I oppose your mission, but you're exceeding its parameters anyway. You've put yourself in jeopardy. You've done enough. If you will not come to me, I will find my way to you." - One of the Didact's messages to the Librarian.
- "No. Activation is murder. A genocide larger than [this galaxy] has ever known. We are sworn to protect life not destroy it! That is the Mantle we were given to carry." - A response to the Librarian's plea to activate the Halo Array.
- "The Mantle has not failed! I've already razed scores of worlds - sterilized systems, routed and [disintegrated] the parasite! We're learning its tricks and strategies. We can halt this thing! And we can follow in Their footsteps! There are no unstoppable forces in this universe. There are no immovable objects. Everything gives if you push hard enough." - The Didact insists that the Flood can be defeated in another message to the Librarian.
- "We've confirmed your observations. Infected supraluminal ships are arrowing inward from several clusters. No more spiral growth. The thing is counterattacking. Suppression, Security and Emergency Circumstance fleets are all being recalled. Systems are evacuating. Mendicant Bias is no longer communicating with us. But now I can guess where you are." - The Didact responding to one of the Librarian's final transmissions as the Flood's collective forces, led by a rampant Mendicant Bias, bear on the Maginot Sphere.
- "Proud? When I have failed you utterly, how can I feel anything but sorrow?
- Bias has come undone. He crossed the line this morning - brought the abomination with him - and destroyed your waiting rescue party.
- It's over. We're activating the [destructive arrayed matrix], our shameful last resort. I can picture you in your garden, surveying all you have created - surveying all you have preserved. And I curse the circumstance that keeps my finger on the trigger.
- Of all the fates to befall us, this is the cruelest of all. My inaction and hesitation and foolishness kept me here, on the wrong side of the line. And [300 years[?]] of our society's failure and miscalculation makes me your executioner. It's too much to bear.
- Mendicant Bias is trying to prevent us from firing the Array. He speeds back to the Ark, but he won't succeed. Offensive Bias will stop him, and I will burn this stinking menace in your name.
- And then?
- I will begin our Great Journey without you, carrying this bitter record. Those who came after will know what we bought with this [false transcendence] - what you bought, and the price you paid." - The Didact's final transmission to the Librarian before activating the Halo Array.
Halo: Primordium
- "Beggar after knowledge. Mendicant Bias. That is the name I gave you when last we met. Do you remember the moment of your inception? The moment I connected you to the Domain and you were ceded control of all Forerunner defenses?" - The IsoDidact as he prepares to deactivate Mendicant Bias.
- "Poor machine. Poor, poor machine. Your time here is done." - before he shuts down Mendicant Bias.
- "Sickness, slavery, lingering death! We will analyze everything here, and we will learn. The Flood will be defeated." - Bornstellar Didact, defying the Primordial's assertions that the Forerunners will eventually submit to the Flood.
- "Let your life race ahead. You were made to survive deep time, but now it will arrive all at once. No sweetness, no more lies! Let a billion years pass in endless silence and isolation..." - Bornstellar-Didact as he executes the Primordial by activating its stasis chamber.
- "No answer! Again and yet again—never an answer!" - after killing the Primordial.
- "Nothing is decided. This isn't over. It will never be over." - refusing to give up after the Primordial renders judgment on the Forerunners.
Halo: Silentium
- "No longer a Promethean. No longer a Warrior-Servant. A traitor!" - The IsoDidact responding to the Ur-Didact using a Composer on Omega Halo, and then deserting the Forerunners.
- "Forgive us." - The IsoDidact before activating the Halo Array.