How do the events of the story support grandpa's idea that thing will be done when it is the right time in medicine bag story?

In the story "Medicine Bag," the events support Grandpa's idea by showing that Martin's journey to receive the medicine bag coincides with the time when he is mature enough to understand and appreciate its significance. Martin's growth during the trip reflects his readiness to inherit the wisdom and heritage the medicine bag represents, highlighting the idea that things happen when the individual is prepared to receive and embrace them. This demonstrates the belief that valuable experiences and knowledge will come at the right time when they can be fully understood and utilized.