Jesus was talking about the Holy Spirit, who would be given to everyone that had faith in him. The Spirit had not yet been given to anyone, since Jesus had not yet been given his full glory.
“When the last days come, I will give my Spirit to everyone. Your sons and daughters will prophesy. Your young men will see visions, and your old men will have dreams.
God gives you his Spirit and works miracles in you. But does he do this because you obey the Law of Moses or because you have heard about Christ and have faith in him?