Article continues below advertisementDick Van Dyke is filled with nothing but gratitude as he counts down the days until he turns 100 on Saturday, December 13.In a new interview, the legendary actor explained why he's always feeling optimistic despite knowing that his days are numbered.Article continues below advertisementDick Van Dyke Stills Feels 'Really Good'Source: megaDick Van Dyke joked he feels 13 despite turning 100 in December."When you expire, you expire. I don't have any fear of dearth for some reason. I can't explain that but I don't," he spilled to a magazine.