In the beginning of The Giver, Jonas blindly and naively accepts what his society has taught him. The depths of this aren't realized until many chapters later, but he lacks the knowledge of color, love, and extended family. He is incredibly law-abiding, even in minor rules, and recalls with a smile the error of a former pilot who was released for his mistake. He is precise with language, struggling to utilize just the right word to ensure his meaning is conveyed exactly. His most pressing worry relates to his upcoming Assignment.
When Jonas begins his training as Receiver of Memory, everything begins to change. Suddenly, he realizes that there is a quality called color in the world around him:
"I'm right, then," The Giver said. "You're beginning to see the color red."
The Giver sighed. "How to explain this? Once, back in the time of the memories, everything had a shape and size, the way things still do, but they also had a quality called color.
"There were a lot of colors, and one of them was called red. That's the one you are starting to see."
When Jonas begins to realize all that has been taken away from members of his society in order to achieve Sameness, his feelings begin to shift:
He found that he was often angry, now: irrationally angry at his groupmates, that they were satisfied with their lives which had none of the vibrance his own was taking on. And he was angry at himself, that he could not change that for them.
And as he begins to see that a superficial satisfaction with life is not actually the best way to live, he begins to want more for all of them.
As Jonas spends more time with the Giver, he grows to love him. They share many reflective moments together as Jonas tries to make sense of all the memories he receives, and the Giver "happily" gives Jonas his very favorite memory—of Christmas, with an entire family from young children to grandparents.
Jonas also begins to really love Gabriel and wants him to escape the Release he seems destined for, so he boldly devises a plan with the Giver in an effort to save him and hopefully provide for a better life for the entire community.