Acting on believed virtue and morals is flawed epistemology.

 People who view intellectual agents and communities (themselves) as the primary focus of epistemic evaluation,  focus on the intellectual virtues and vices embodied in and expressed by these agents and communities.  i.e Virtues are not opinions to 'us' the enlightened they are 'facts'.

This kind of 'certainty' hardly expands epistemology’s horizons.

• Epistemologists (those interested in examining their certainty) should focus their efforts on understanding epistemic norms, value, and evaluation.
• Those opposing moral or virtue certainty  think that epistemological terms (or concepts) like ‘knowledge’, ‘evidence’, ‘justification’, ‘duty’ and ‘virtue’ cannot be adequately defined.
• Some  think that epistemology should aim to promote intellectual well being. Perhaps an epistemological theory should be “practically useful” 
• in helping us recognize when we do or don’t know something (Zagzebski 1996: 267), 
• or help us overcome “anxieties” due to defective presuppositions about knowledge (McDowell 1994, xi; Pritchard 2016a). 
• Perhaps epistemology should help us appreciate and respond to forms of “epistemic injustice” (Fricker 2007). 
• Perhaps epistemology should inspire us with portraits of intellectual virtues, thereby promoting cultural reformation and intellectual flourishing (Roberts and Wood 2007). 
• Perhaps epistemology should examine intellectual vices and other defects to tell cautionary tales of what not to do and how not to be (Alfano 2015, Battaly 2014, Cassam 2016). 
• Or perhaps practitioners should help redesign educational institutions to help students cultivate intellectual virtues (e.g., the Intellectual Virtues Academy—see Other Internet Resources).

People, us, you and me cannot be the central tendency of viewing intellectual agents and communities as the primary source of epistemic value and the primary focus of epistemic evaluation and a further justification of virtue ethics may be the claim that out traits constitutive of their cognitive character...which would lead us into evolutionary ethics, or the claim that such exists.

For Virtue Ethics the relevant properties are moral traits, and for Virtue Epistemology intellectual traits.

Who are the sources of our knowledge/epistemology?

Plato; Aristotle; Aquinas;  Descartes; Kierkegaard; Nietzsche; Hume

Importanly Islamic philosophy offers precursors to contemporary virtue epistemology, such as discussions of the epistemic value of imagination in al-Kindī and al-Fārābī (Adamson 2015) and Avicenna’s sophisticated social epistemology of reliable and unreliable testimony (Black 2013)