"can you dig it" is also the same thing as "can you roll with it" or "do you find it acceptable". basically, meaning if one can agree with a certain thing.
The Giver told Jonas that the things he saw were because Jonas was able to recognize color before everything else was the same.
It showed that Jonas, like the Giver, was different from the rest of the people in the community because they can see into the future because of the passing of memories.
He use of suspense creeps up on the reader almost without notice
