Differences...
The difference between good thinking and bad thinking is this: good thinking deals with causes and effects and leads to logical, constructive planning; bad thinking frequently leads to tension and nervous breakdowns”
– Dale Carnegie
About Tomorrow...
“The best possible way to prepare for tomorrow is to concentrate with all your intelligence, with all your enthusiasm, on doing today’s work superbly today. That is the only possible way you can prepare for the future”
– Dale Carnegie