No research without action, no action without research.
Learning is more effective when it is an active rather than a passive process.
If you want truly to understand something, try to change it.
If you want to learn about an organization, try to change it.
Every psychological event depends upon the state of the person and at the same time on the environment, although their relative importance is different in different cases
A successful individual typically sets his next goal somewhat, but not too much, above his last achievement.