John 11:39 Jesus said, Take ye away the stone. Martha, the sister of him that was dead, saith unto him, Lord, by this time he stinketh: for he hath been dead four days. 40 Jesus saith unto her, Said I not unto thee, that, if thou wouldest believe, thou shouldest see the glory of God? 41 Then they took away the stone from the place where the dead was laid. And Jesus lifted up his eyes, and said, Father, I thank thee that thou hast heard me. 42 And I knew that thou hearest me always: but because of the people which stand by I said it, that they may believe that thou hast sent me. 43 And when he thus had spoken, he cried with a loud voice,Lazarus, come forth. 44 And he that was dead came forth, bound hand and foot with grave clothes: and his face was bound about with a napkin. Jesus saith unto them, Loose him, and let him go.
Contrast this with...
Mark 6:4 But Jesus said unto them (of Nazareth), A prophet is not without honour, but in his own country, and among his own kin, and in his own house. 5 And he could there do no mighty work, save that he laid his hands upon a few sick folk, and healed them. 6 And he marvelled because of their unbelief. And he went round about the villages, teaching.
He could do no mighty works there because of their unbelief. I've noticed a lack of mighty works here in America as well. Luke 18:8 I tell you that he will avenge them speedily. Nevertheless when the Son of man cometh, shall he find faith on the earth?