From the modern "Hippocratic Oath"

I excerpt a couple of items from the oath now used on graduation from many medical schools:

I swear to fulfill, to the best of my ability and judgment, this covenant:

I will respect the hard-won scientific gains of those physicians in whose steps I walk, and gladly share such knowledge as is mine with those who are to follow......

I will not be ashamed to say "I know not," nor will I fail to call in my colleagues when the skills of another are needed for a patient's recovery.

These are pretty good rules for any practitioner of knowledge for development.