老鼠因為經常遭受貓的侵襲，深感苦惱。一天，他們聚集起來商量如何在貓靠近時發出警報。會上，有一條建議得到了大家一致的肯定，那就是在貓的脖子上掛一個鈴鐺，以後隻要一聽到鈴鐺的聲音，大家就知道貓來了，可以馬上逃跑。可是，當他們進一步討論時，卻發現找不到能把鈴鐺拴到貓脖子上的 “勇士 ”。
想是一回事，做是另一回事。
The Mied a cil to deight best devise means themselves of the approach reat e. Among the many plahe o found most favor roposal to tie a bell to the he Cat，so that the Mig warhe souinkling，might run away ahemselves in their holes at his approach.But wheher debated who among them should thus “bell the Cat，” there was o do it.
It is oo propose，ao execute.