Proper

Correct doesn't mean proper. I give you an example:

1. In an examination. All the candidates doing their exam as they think are correct. Some doing their exam truthfully and some waiting the answer from their friend sitting next to him/her. At the moment, they think they doing the correct/right action, but that doesn't mean proper.

2. A wife found out that her husband has an affair with other woman. You can imagine how the wife act. At the moment the wife think what is correct for her, but doesn't think properly.

3. Adolf Hitler (German politician and the leader of the National Socialist German Workers Party) at that time he think what is correct for the nation, but that  does not mean proper for the nation.

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