At the end of the novel Allegiant by Veronica Roth, Tobias thinks about what he has known since childhood: "Life damages us, every one. We can't escape that damage. But now, I am also learning this: We can be mended. We mend each other." How can this be interpreted as a summary of this novel Allegiant and the entire Divergent trilogy by V. Roth?
Allegiant revealed that the ‘divergents’ are those called 'genetically pure' individuals contrary to what they know inside the Chicago experiments. Tobias Eaton (known as Four) lived in a life where there are genes to be repaired. Before the third book, Thomas knew that he is divergent but he found out that he is genetically impure. There is a part in Allegiant where Tobias felt some sort of insecurities knowing that he is not pure just like his girlfriend Tris.
“Life damages us, every one. We can't escape that damage. But now, I am also learning this: We can be mended. We mend each other.”
There is probably a cure for the genetically damaged but the tests are not working the way it should be. The Chicago experiment is promising but the war has just begun. Tris, the main protagonist in the book died and that turned Thomas' life upside down.
Later on, as Thomas realized what had happened, he actually wanted to drink the memory serum but Christina encouraged him not to. He wanted to just forget everything and start over again - but that is not the cure to everything. They need each other in order to cope up with all the losses. The life is very uncertain; we can live today and die tomorrow. There are circumstances and we can be affected with the changes and be called damaged. However, things can be mended or repaired. And one of the best repair mechanisms for us humans is to be with each other. He said those words in the last part of Allegiant where he appreciated the life that he has.