Q: An aim gives a meaning, a purpose to life, and this purpose implies an effort; and it is in effort that one finds joy.
A: Exactly. It is the effort which gives joy; a human being who does not know how to make an effort will never find joy. Those who are essentially lazy will never find joy – they do not have the strength to be joyful! It is effort which gives joy. Effort makes the being vibrate at a certain degree of tension which makes it possible for you to feel the joy.
Ref: Questions and Answers 1950–1951