The ends don't justify the means.

Meaning

Achieving a good outcome does not excuse unethical methods.

Examples

• John: We could achieve our goal much faster if we used this method, even though it's a bit shady.
• Alice: I understand the temptation, but <b>the ends don't justify the means</b>. We need to stick to ethical practices.
• John: But the consequences of missing the deadline are severe.
• Alice: I agree, but compromising our principles is worse. We can't let the pressure lead us to believe <b>the ends don't justify the means</b>.