"Actually the best way to see if the bible is true or not is to read Christ's words and see if there is one untrue statement in there."
Oh, this is easy, assuming that we use the words that are attributed to the Biblical Jesus (whether or not he actually said them, a Bible believer will believe Jesus said them).
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Mark 4:31, [It is] like a grain of mustard seed, which, when it is sown in the earth, is less than all the seeds that be in the earth:
Wolffia, Poppy and Orchid seeds are smaller than the mustard seed.
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Mark 9:50 Salt [is] good: but if the salt have lost his saltness, wherewith will ye season it? Have salt in yourselves, and have peace one with another.
Luke 13:34 Salt [is] good: but if the salt have lost his savour, wherewith shall it be seasoned?
Salt does not lose it's saltiness or flavor (savour).
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Luke 13:19: It is like a grain of mustard seed, which a man took, and cast into his garden; and it grew, and waxed a great tree; and the fowls of the air lodged in the branches of it.
Mustard is not a tree.
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You'd think the all-knowing creator of the universe would have known such things about his creation.
You asked for ONE untrue statement attributed to Jesus, I just provided THREE untrue statements attributed to Jesus. What do I win?