How does one battle discouragement in prolonged suffering?

My journal entry from 9.11.05 filled only five lines.

Again there is no change in my condition, except that my lip is nearly healed. I continue to make mucous, especially at night. If I swallow any, it gets thrown up at some point – violently. The amount of mucous is staggering. It is difficult not to be discouraged. Cast your burden on the Lord and He will sustain you (Psa. 55:22).

Take this massive promise to the vault of heaven and cash it in over and over again from the endless resources of God’s care.

That’s how to battle discouragement in prolonged suffering.