That line has been spoken and written often by Stan Lee, creator of Spider-Man, and it's as appropriate for us today as it is for his readers. Who could imagine that young, nerdy Peter Parker is really the heroic Spider-Man? He seems like exactly the wrong kind of person to perform the amazing feats of that hero, but the "true believers" that follow his story know better.
Christian believers know the same truth - that appearances can be deceiving, that sometimes the hero you needed is not the one you expected. Think about Zechariah's prophesied savior-king:
"...meek, and riding on an ass... He shall banish the chariot from Ephraim,andHe described a meek man riding a donkey, rather than a powerful king on a war horse - a man that would banish weapons rather than use them. Perhaps the Jews of the time thought they would get a mighty king or brilliant strategist that could lead them to battle, perhaps something of a videogame hero, with rippling muscles, that can take on the enemy single-handed. God, on the other hand, knew what they really needed - what we all needed.
the horse from Jerusalem; the warrior’s bow shall be banished, and he shall
proclaim peace to the nations." (Zec 9:9-10)