How powerful is this statement! Christ has given us the authority to do even greater works that what He has done! We have the authority to heal and cast out demons. We have the God in us and for us whom parted the Red Sea and created our inmost being.
Also, There are so many more Christians now than in His time - we can make such an impact together... if we feel like it. Sometimes I feel like Christians (very much including myself) are getting lazier and lazier. I mean, when Jesus ascended into Heaven, all his followers wanted to do was preach and do good works. Of course they still had to eat, drink, sleep, and many of them fell in love and started families.
So what is our excuse?
At the Pentecost (Acts 2), shortly after Christ went to Heaven, more people became followers of Christ than in the 3 years of His ministry on this earth!
So what makes them so different from us?
Yes it is true that not all of us are called to be preachers - but we can still love and be open about our faith and prepare ourselves for when opportunities to share it arise! We are given the most real and powerful authority on earth! Let's use that. Let's remember why we're here. It's not for us, for crying out loud! It's for Him who died for us!