This Is Why

James 1:2-4

2 Consider it pure joy, my brothers and sisters, whenever you face trials of many kinds, 3 because you know that the testing of your faith produces perseverance. 4 Let perseverance finish its work so that you may be mature and complete, not lacking anything.

Hebrews 12 1 Therefore, since we are surrounded by such a great cloud of witnesses, let us throw off everything that hinders and the sin that so easily entangles. And let us run with perseverance the race marked out for us, 2 fixing our eyes on Jesus, the pioneer and perfecter of faith. For the joy set before him he endured the cross, scorning its shame, and sat down at the right hand of the throne of God. 3 Consider him who endured such opposition from sinners, so that you will not grow weary and lose heart.

Hebrews 10:23

23 Let us hold unswervingly to the hope we profess, for he who promised is faithful.

Hebrews 10:35-11:1

35 So do not throw away your confidence; it will be richly rewarded. 36 You need to persevere so that when you have done the will of God, you will receive what he has promised. 37 For, “In just a little while, he who is coming will come and will not delay.” 38 And, “But my righteous one will live by faith. And I take no pleasure in the one who shrinks back.” 39 But we do not belong to those who shrink back and are destroyed, but to those who have faith and are saved.

Hebrews 11 1 Now faith is confidence in what we hope for and assurance about what we do not see.

Hebrews 11:32-40 32 And what more shall I say? I do not have time to tell about Gideon, Barak, Samson and Jephthah, about David and Samuel and the prophets, 33 who through faith conquered kingdoms, administered justice, and gained what was promised; who shut the mouths of lions, 34 quenched the fury of the flames, and escaped the edge of the sword; whose weakness was turned to strength; and who became powerful in battle and routed foreign armies. 35 Women received back their dead, raised to life again. There were others who were tortured, refusing to be released so that they might gain an even better resurrection. 36 Some faced jeers and flogging, and even chains and imprisonment. 37 They were put to death by stoning; they were sawed in two; they were killed by the sword. They went about in sheepskins and goatskins, destitute, persecuted and mistreated— 38 the world was not worthy of them. They wandered in deserts and mountains, living in caves and in holes in the ground. 39 These were all commended for their faith, yet none of them received what had been promised, 40 since God had planned something better for us so that only together with us would they be made perfect.

Hebrews 12:22-24 22 But you have come to Mount Zion, to the city of the living God, the heavenly Jerusalem. You have come to thousands upon thousands of angels in joyful assembly, 23 to the church of the firstborn, whose names are written in heaven. You have come to God, the Judge of all, to the spirits of the righteous made perfect, 24 to Jesus the mediator of a new covenant, and to the sprinkled blood that speaks a better word than the blood of Abel.

Hebrews 13

20 Now may the God of peace, who through the blood of the eternal covenant brought back from the dead our Lord Jesus, that great Shepherd of the sheep, 21 equip you with everything good for doing his will, and may he work in us what is pleasing to him, through Jesus Christ, to whom be glory for ever and ever. Amen.

NIV Scripture copied from here.