High-minded:

"having very high moral standards of behaviour"

"marked by elevated principles and feelings"

"elevated ideals or conduct; the quality of believing that ideals should be pursued"

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Synonyms for high-minded:

chivalrous, elevated, gallant, great, greathearted, high, lordly, magnanimous, noble, sublime;

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Idealism:

"Idealism, as 'noble-mindedness,' is the belief that we should always strive for our highest ideals."

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Noble-minded:

"of high moral or intellectual value; elevated in nature or style"

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[See also: Elevation and Idealistic Attitudes]