perseverance

Great difficulties may be surmounted by patience and perseverance. Abigail Adams

Rejoice in hope, be patient in tribulation, be constant in prayer. Romans 12:12

adversity

The difficulties of life are intended to make us better, not bitter. ~ authorĀ  unknown

Adversity has the effect of eliciting talents which, in prosperous circumstances, would have lain dormant. ~Horace