So I returned, and considered - Rather, And I returned and saw. He turns to look upon other phenomena, and to test his previous conclusion by them.
Oppressed - See the introduction to Ecclesiastes.
Related Commentaries of Ecclesiastes 4:1
Ecclesiastes 4:1
1 So I returned, and considered all the oppressions that are done under the sun: and behold the tears of such as were oppressed, and they had no comforter; and on the sidea of their oppressors there was power; but they had no comforter.