In today's gospel, Jesus said to His disciples: "whoever believes in me will do the works that I do, and will do greater ones than these". When we hear these words, we might be surprised. Jesus is the Lord, how could humans do greater works?
Our human capabilities are limited, but Jesus said: "If you ask anything of me in my name, I will do it." As long as we ask Him out of the love for Him, and that it is not something that is against His will, He will do it. And for this reason, we are able to do "greater works".