12:1 At that time, when thousands of the people had come together, in such numbers that they were crushing one another, he said first to his disciples, Have nothing to do with the leaven of the Pharisees, which is deceit.
12:2 But nothing is covered up, which will not come to light, or secret, which will not be made clear.
Trade originated with the start of communication in prehistoric time. Trading was the main facility of prehistoric people, who bartered goods and services from each other. Peter Watson dates the history of long-distance commerce from circa 150,000 years ago.