Fear the Lord always.
v.13 Mercy. If you conceal (cover up, blame others, excuse, indulge) your sins you will not succeed, but if you confess and forsake (abandon) them you will obtain mercy. See 1 Jn 1:9 and Ps 51:4.
v.14 Beatitude. Blessed is the one who fears God always (by confessing and forsaking sins, v.13). But the one who hardens his heart will fall into trouble. Work out your salvation with fear and trembling (Phil 2:12).
v.15-16 Wicked ruler. A wicked ruler is like a dangerous wild animal (i.e., attacking bear or lion) preying on the poor of his country. A ruler without understanding (wisdom) is a cruel oppressor. But, a ruler who doesn’t go after gain unjustly will have prolonged days.
v.17-18 Walk in integrity. Do not help a murderer who is a fugitive fleeing from justice. He who walks in integrity will be delivered but the one crooked in his ways will suddenly fall.

Read Proverbs 28:13-18