There are a lot of things in the world that we can achieve if we put in the required amount and appropriate type of effort. Many of us can very probably accumulate money, live in relative luxury, find love, raise children to become valuable members of society, achieve power, pursue our dreams, travel, what have you.
Yet if we are to live happily, we must come to terms with the fact that we cannot achieve everything that we set our minds to, we cannot reach every goal that we set. Some things are beyond our abilities, some things are no more than fantasies and rightly so.
It would be wrong to see not achieving something as a failure if that thing cannot be achieved by our own actions, or if achieving it would require us to sacrifice something more dear to us. For example, I would love to stand on the moon or on Mars, but there is nothing I can do that will allow me to achieve that. Therefore, I acknowledge that it is a desire I harbour, but I accept it is not within my sphere of influence to bring it about.
My mum was a great one for comforting us when we failed to achieve something by saying “It just wasn’t meant to be.” Yes, we should try, and yes, when we fail we should often try, try again; but if it just isn’t meant to be we need to accommodate that fact and put our effort into something that we can influence and have better potential to achieve.
It is also worth noting that just because something is a fantasy, not achievable in this lifetime, it does not follow that the thing should be abandoned utterly. It makes me happy to dream of standing on the moon or Mars and always will, despite the fact I can’t do it anywhere but in my head. The pleasure of a thing is not necessarily confined to the achievement or ownership of it.