Though a sinner do evil an hundred times, and his days be prolonged, yet surely I know that it shall be well with them that fear God, which fear before him:
Though a sinner do evil an hundred times ... He says this, lest the sinner should abuse the statement (Ecclesiastes 7:15), "A wicked man prolongeth his life."
Which fear before him - literally, at His presence; reverently serve Him, realizing His continual presence.