Endurance is the ability to perceiver hardship by embracing good deeds.
Its is the one test of faith among the Christians. For how can we believe in a God who is not evident in our live….in most situations we find ourselves?
Pain and suffering is short lived but standing for Christ even in such situations calls for a precious crown in the second earth (Heaven).
2 Timothy 2:12 NIV
if we endure, we will also reign with him. If we disown him, he will also disown us;

2 Timothy 4:5-7 NIV
But you, keep your head in all situations, endure hardship, do the work of an evangelist, discharge all the duties of your ministry. [6] For I am already being poured out like a drink offering, and the time for my departure is near. [7] I have fought the good fight, I have finished the race, I have kept the faith.

As Paul talks of the race, he illustrates of how much it takes to endure. A race entail much, rules that must be followed, aim or goal, pressure from the environment etc, but all that has the importance is the crown at the end of the race.

Hebrews 12:7-8 NIV
Endure hardship as discipline; God is treating you as his children. For what children are not disciplined by their father? [8] If you are not disciplined—and everyone undergoes discipline—then you are not legitimate, not true sons and daughters at all.
A true child of God is made through a test of hardship which is a way to discipline ( keep on line, determined,obedient). One gains trust from God in the long run.
Therefore, brethren let’s endure in all for its for the benefit of our faith in God…. Lax not but run the race.