Men are evil. Luke 11:13 "If ye then, being evil, know how to give good gifts unto your children: how much more shall your heavenly Father give the Holy Spirit to them that ask him?"
Their hearts are evil. Mark 7:21 "For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders,"
Their nature is evil. Ephesians 2:1-3 "1 And you [hath he quickened], who were dead in trespasses and sins; 2 Wherein in time past ye walked according to the course of this world, according to the prince of the power of the air, the spirit that now worketh in the children of disobedience: 3 Among whom also we all had our conversation in times past in the lusts of our flesh, fulfilling the desires of the flesh and of the mind; and were by nature the children of wrath, even as others."
Their world is evil. Galatians 1:4 "Who gave himself for our sins, that he might deliver us from this present evil world, according to the will of God and our Father"
Their god is evil. 2 Corinthians 4:4 "In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them."
Summing them up, St. Paul says, in Romans 3:10b-18:
"10 As it is written, There is none righteous, no, not one: 11 There is none that understandeth, there is none that seeketh after God. 12 They are all gone out of the way, they are together become unprofitable; there is none that doeth good, no, not one. 13 Their throat [is] an open sepulchre; with their tongues they have used deceit; the poison of asps [is] under their lips: 14 Whose mouth [is] full of cursing and bitterness: 15 Their feet [are] swift to shed blood: 16 Destruction and misery [are] in their ways: 17 And the way of peace have they not known: 18 There is no fear of God before their eyes."