Hope is not logical, but a ‘participation in the very life of God’ (just like faith and love, which were called ‘theological virtues’ as opposed to virtues acquired by practice, temperament, or willpower). That doesn’t mean we should not practice being hopeful, but it is still not a matter of pure willpower. Faith, hope, and love are always somehow a gift – a cooperation with Someone Else, a participation in Something Larger than me.