God can use one upright man can effect an entire generation of upright people. He frequently does. What makes this upright man? He greatly delights in the commandments. What kind of things does he do? We have glimpses here but, it is more to do with how he goes about the things that he does. This description is very similar to the description of Job's uprightness, as in distributing to the poor. It doesn't say that evil tidings will not come, it says the he will not be afraid of them, his heart is fixed trusting in the Lord.
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