God equates belittling His signs with rejecting Him. The signs of the weekly and annual Sabbaths are emphasized by God, but commonly cast aside by men.
Correct actions become a sign—a witness—even without any preaching, which is why God's words are symbolically bound to the hand rather than the tongue.
In Matthew 12:39, Jesus Christ says that "an evil and adulterous generation seeks after a sign. ...
Ever since the rainbow after the flood, God has been providing additional signs, particularly those that promise that He will provide a Savior and Redeemer.
The apostle Paul teaches that tongues (languages) are only used to communicate intelligently, not gibberish. Tongues originally served as a sign for unbelievers.
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