飲水思源 喝水的時候想起水是從哪兒來的。比喻不忘本。
筌：捕魚用的竹器。捕到了魚，忘掉了筌。比喻事情成功以后就忘了本來依靠的東西。
[forget the means by which the end is attained;forget the trap as soon as the fish is caught] 筌是用來捕魚的器具。得到了魚,就忘掉筌。比喻達到目的以后就忘了賴以成功的東西
筌者所以在魚,得魚而忘筌?！?span id="xvnhb7t" class="shu">《莊子·外物》
見“ 得魚忘荃 ”。