For those trying to implement the latest technological solution without first thinking about solving the underliying problems
"There is nothing so useless as doing efficiently that which should not be done at all."
For those that are satisfied with what they already know
"Knowledge has to be improved, challenged, and increased constantly, or it vanishes."
and for those that never reflect on what they just did
"Follow effective action with quiet reflection. From the quiet reflection will come even more effective action."