17 Now the crowd that was with Him when He called Lazarus from the tomb and raised him from the dead bore testimony to this.
18 The crowd, also met with Him, because they had heard He had done this miraculous sign.
The crowds were drawn to Jesus, because many of them had witnessed Jesus raising Lazarus from the dead.
They were unashamedly attracted by a display of the Divine spectacular, and we can imagine that they were looking for more.
They might have thought that since Jesus had raised Lazarus from the dead, the possibilities of what He could do might be endless.
We can be thankful that through the out pouring of the Holy Spirit we can still experience the miraculous power of Jesus.
One of the characteristics of the church of Jesus should be a display of the miraculous power of Jesus. When Paul wrote to the Church at Corinth he called their attention to the gifts of the Holy Spirit, which includes the gifts of miracles and the gifts of healing – 1 Corinthians 12. He made the point that all the gifts are for the benefit of the whole church.
Jesus sent out His disciples with these words:  Go and announce to them that the Kingdom of Heaven is near.  Heal the sick, raise the dead, cure those with leprosy, and cast out demons. Give as freely as you have received! – Matthew 10.7-8 (NLT).