When thinking about accomplishing a seemingly tedious task, one can say “it’s impossible” or he can say “it’s possible”.
The reality is that whichever way you decide to look at it, the difficulty of achieving the goal remains the same.
But you should always choose optimism. The reason is because when we say it’s possible, we will find ways to succeed. On the other hand, if we say it’s impossible, we would have failed even before we begin.
Saying that it’s possible boosts our chance of success. And if it’s the better choice, there’s no reason we should choose otherwise.