For patience, read endurance; that is really nearer to the Greek term: for ye have need of endurance. Why do God’s people need to be told that they must have patience, endurance? We might say this to those who have a long and arduous task ahead of them.
We cannot reach our heavenly destination by a short burst of activity for the Lord. The one who thinks that is enough will leave off building with his house only half completed. He will have miscalculated what it is going to take get to the end. He was perhaps overconfident about living the Christian life. He looked around at other runners in the heavenly race and thought, ‘I can go faster than these, and make more progress than my peers. I have spiritual gifts that they do not have, and I will find it easier than them to do significant things for the Lord.’ There may be pride in such a person, and self-reliance. The power of temptation has been underestimated, and the pull of the world is stronger than the flesh can cope with, because there has not been an initial death to sin.