One story is good, till another is told. 是什么意思？

QUOTE:

The Man and the Lion
A Man and a Lion traveled together through the forest. They soon began to boast of their respective superiority to each other in strength and prowess. As they were disputing, they passed a statue carved in stone, which represented "a Lion strangled by a Man." The traveler pointed to it and said: "See there! How strong we are, and how we prevail over even the king of beasts." The Lion replied: "This statue was made by one of you men. If we Lions knew how to erect statues, you would see the Man placed under the paw of the Lion."
One story is good, till another is told.

人与同行的狮子
有一天，狮子与人同行赶路，他们互相吹嘘自己。在路上，他们看见一块石碑，石碑上 刻着一个人征服几头狮子的图画。那人一边指给狮子看，一边说：“你看，事实证明我们比 你们强得多了吧。”狮子笑着说道：“如果狮子们会雕刻，那么你就会看见众多人倒在狮子脚下。”

这故事是说，那些自己毫无本事的人却喜欢常常在别人面前炫耀自己。

One story is good, till another is told. 是什么意思？