Knowledge - is absolute truth or what one believes in or 'first party' reality and is without a need of explanation;
Understanding - is 'second party' expression or virtues of truth i.e., morality, behaviors or changes in attitude
Observation is 'third party' or physical measurement...
Albert Einstein says that knowledge is a tree of which different specializations are its branches. Sri Krishna in Bhagwat Gita similarly, says that Knowledge is a tree upside down i.e., of which root is on top; and trunk, branches and leaves spread at bottom.
If we all see the expansion of...