An old monkey on the point of death summoned his sons around him to give them some parting advice. He ordered them to bring in a bundle of sticks, and said to his eldest son: "Break it." The son strained and strained, but with all his efforts was unable to break the sticks. The other sons also tried, but none of them was successful. "Untie the bundle," said the father, "and each of you take a stick." When they had done so, he called out to them: "Now, break," and each stick was easily broken. "You see my meaning," said their father.

What was the father’s meaning?