What does george say made him stop being mean to Lennie?

One time george made Lennie jumo into a lake (to make fun of him) eventhough Lennie couldn't swim. Lennie started to drown and so George jumped in and got him out. After that Lennie was so thankful to george for getting him out that he forgot George was the one who told him to get into the lake in the first place - this made george appreciate Lennie