Complex sentence: The stroke left his grandfather with the use of only one arm and during visits he often emphasized the importance of appreciating the ability to do things with ones hands and to try make the most of your hands to create things that solve problems.
Split into simpler sentences: The stroke left his grandfather with the use of only one arm. During visits, Hunt's grandfather emphasized the importance of appreciating the ability to do things with ones hands and to try make the most of your hands to create things that solve problems.