Tenet quotes

Andrei Sator: This is where our worlds collide. How would you like to die?
The Protagonist: Old.
Andrei Sator: You chose the wrong profession.

Andrei Sator, The Protagonist

This reversing the flow of time, doesn't us being here now, mean it never happened?

The Protagonist

Neil: What the hell happened here?
The Protagonist: Hasn't happened yet.

Neil, The Protagonist