Do we choose to believe in the goodness in people, and then actively search for qualities that reflect this idea?
If we look for the good in others, even when they present a reality that does not match our definition of "good people," perhaps over time we'll see glimpses, heck, maybe a rainbow of goodness. Patience is a virtue. Give them time to show their true colors.
In the meantime, seek and ye shall find. And let's keep in mind, seek is an action verb.