Five things I know for Sure:
1.) David Suchet is the quintessential "Poirot;"
2.) No home has enough space for all the books one requires;
3.) Time off from work is a necessary part of human survival;
4.) You can only understand the world around you when you've seen/experienced it;
5.) This list is subject to change/expand/grow in detail on a daily/hourly/moment by moment basis.