"...we Christians can wait expectantly and with fortitude for the 'hope' to manifest itself precisely because that for which we hope is 'unseen' and thereby part of the eternal and sure purposes of God. The attitude of 'patience endurance' is one that is frequently required of Christians undergoing trials and as they await the climax of God's salvation for them. The word suggests the combination of 'bearing up' under intense pressure. This is the virtue required by Christians as we eagerly await 'the hope of the glory of God.'"
--Douglas Moo The Epistle to the Romans p522 commenting on Rom 18:25