from Future Grace, chapter 13:
Patience is the capacity to “wait and to endure” without murmuring and disillusionment– to wait in the unplanned place, and endure the unplanned place.
Patience is the evidence of an inner strength. Impatient people are weak, and therefore dependent on external supports–like schedules that go just right and circumstances that support their fragile hearts. Their outbursts of oaths and threats and harsh criticisms of the culprits who crossed their plans do not sound weak. But that noise is all a camouflage of weakness. Patience demands tremendous inner strength.
For the Christian, this strength comes from God. That is why Paul [Colossians 1:11] is praying for the Colossians. He is asking God to empower them for the patient endurance that the Christian life requires.
…the strength of patience hangs on our capacity to believe that God is up to something good for us in all our delays and detours. This requires great faith in future grace, becuase the evidence is seldom evident.