Effort gives joy
An aim gives a meaning, a purpose to life, and this purpose implies an effort: and it is in effort that one finds joy.
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….
It is only effort, in whatever domain it be–material effort, moral effort, intellectual effort—which creates in the being certain vibrations which enable you to get connected with universal vibrations: and it is this which gives joy. It is effort which pulls you out of inertia: it is effort which makes you receptive to the universal forces. And the one thing above all which spontaneously gives joy, even to those who do not practice yoga, who have no spiritual aspiration, who lead quite an ordinary life, is the exchange of forces with universal forces. People do not know this, they would not be able to tell you that it is due to this, but so it is.
—selections from the Mother