Jesus answered, “The work of God is this: to believe in the one he has sent.”
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Yes, and to Jesus (and to His Church), words actually mean something.
For example, the word "believe" actually means something (and it is not just to concede to the existance of Jesus, which even Satan does).
Jesus explains what one part (but certainly not the only part) of "believe" actually means, right here:
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"Truly, truly, I say to you, he who believes in me will also do the works that I do; and greater works than these will he do, because I go to the Father."
John 14:12✝============================================================✝