We deal with our mind from morning till evening, and it can be our best friend or our worst enemy.
Matthieu Ricard[You] can dramatically change [your emotions] to be more altruistic, more loving, more compassionate, more attentive, and especially to have an inner sort of confidence and strength that you know that you have the resources to deal with whatever comes your way.
Matthieu RicardAlthough the optimist may be a little giddy when foreseeing the future, telling himself that it will all work out in the end when that isn't always the case, his attitude is more fruitful since, in the hope of undertaking a hundred projects, followed up by diligent action, the optimist will end up completing fifty. Conversely, in limiting himself to undertake a mere ten, the pessimist might complete five at best and often fewer, since he'll devote little energy to a task he feels to be doomed from the start.
Matthieu Ricard