II Timothy 3:1-7: But realize this, that in the last days difficult times will come. For men will be lovers of self, lovers of money, boastful, arrogant, revilers, disobedient to parents, ungrateful, unholy, unloving, irreconcilable, malicious gossips, without self-control, brutal, haters of good, treacherous, reckless, conceited, lovers of pleasure rather than lovers of God, holding to a form of godliness, although they have denied its power; Avoid such men as these. For among them are those who enter into households and captivate weak women weighed down with sins, led on by various impulses, always learning and never able to come to the knowledge of the truth.
Many look to world events as a sign of his coming. I think a truer standard is the character of mankind. But I also believe this is descriptive rather than proscriptive. Paul points out the two influences in Timothy's life that set him apart: the influence of godly women in his life (and paul being a godly man in his life) and the word of God.