Rewards: Pesachim 50b

It is always fun to see a famous line in context. In the middle of discussion as to whether there is a reward for good deeds, we find the following:

Rabbi Yehuda says in the name of Rav: A person should always involve himself in Torah and good deeds, even if he is not doing the Torah or good deeds for their own sake. For by means of doing them not for their own sake, he comes to do them for their own sake.