If you have any doubt at all about being able to carry a load in one trip， do yourself a huge favor and make two trips.
"The past is not dead; it is not even past."
微子：商纣王的庶兄。箕子：商纣王的诸父，曾数次谏纣王，王不听把他囚禁。【大意】扁鹊不能使枯骨上长出肉来，微子和箕子不能使将亡之国得以生存下去。
The smallest act of kindness is worth more than the grandest intention.
Cognitive processes are rule-governed transformations of symbolic structures.