In righteousness shalt thou be established; rather, through righteousness. "There is no peace, saith my God, to the wicked" (Isaiah 48:22); and conversely, where righteousness abounds, peace prevails, and the nation "is established."
Thou shalt be far from oppression; rather, be thou far from anxiety (Delitzsch). Thou shalt not fear; rather, thou needest not fear. There is no danger—nothing to be afraid of. "They shall not hurt nor destroy in all my holy mountain" (Isaiah 11:9).
So long as thou art "established through righteousness," there shall no harm happen unto thee.