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.
Jesus Christ is not against signs; the book of John is structured around eight signs. The Old Testament is full of signs that the Pharisees missed.
A scriptural explanation of the time of Christ's death, burial and resurrection, showing that He died on a Wednesday and rose from the dead on the Sabbath.
John and James were related, but still had to have the Messiah revealed to them. God is involved in the details of our lives as well as the great events in history.
When God says that His feasts are special, they really are! Mark Schindler explains that we are vicarious participants in the events the feasts memorialize.
Anger and hostility, driven by self-centered competitive pride constitute Satan's spiritual mark that divides nations, ethnic groups, families, and the church.