What the Bible says - Romans 3:9-12

9...Are we better than they? Not at all. For we have previously charged both Jews and Greeks that they are all under sin.

10  As it is written: "There is none righteous, no, not one;

11  There is none who understands; There is none who seeks after God.

12  They have all turned aside; They have together become unprofitable; There is none who does good, no, not one."