The word endure in common usage means to last or to sustain (through). If we look at its root, endure comes from the Latin indurare, meaning to harden. Things need to be hardened if they are going to undergo significant stress or trials or pressure. Our word durable has the same root as endure. Metal is hardened or tempered to make it stronger, more durable. The process of hardening is just as important as the final hardened state; if the hardening is not done properly, flaws can be introduced, resulting in a relatively weak or actually weak product. When I think of endurance I think of the Savior. "Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God" (Heb. 12:2). Jesus endured trials, tribulations, sorrows, sufferings, hate, spitting, hitting, and crucifixion. He endured the travesties of the lies brought against Him; He was hated and persecuted. Those who follow Him covenant that they are willing to follow His path, even though they be "hated of all men for [His] name’s sake: but he that shall endure unto the end, the same shall be saved" (Mark 13:13). We are commanded to endure just as the Savior endured.
The gift given unto those who endure is great, even the greatest gift possible. Jesus said, "And, if you keep my commandments and endure to the end you shall have eternal life, which gift is the greatest of all the gifts of God" (D&C 14:7). He also promised, "And then, if thou endure it well, God shall exalt thee on high; thou shalt triumph over all thy foes" (D&C 121:8). Again, suffering is implicit to endurance but those who endure are strengthened against and through suffering. But what is important are the promised blessings that come unto those who endure. "If thou endure it [adversities and afflictions] well, God shall exalt thee on high." What a beautiful promise! Endurance leads to exaltation.
There is a beautiful passage in Hebrews illustrating God's love for us through His chastening of us. Some may question how God's chastening of us is an expression of His love. How can His causing our suffering be loving? This passage from Hebrews explains: "If ye endure chastening, God dealeth with you as with sons; for what son is he whom the father chasteneth not? But if ye be without chastisement, whereof all are partakers, then are ye bastards, and not sons. Furthermore we have had fathers of our flesh which corrected us, and we gave them reverence: shall we not much rather be in subjection unto the Father of spirits, and live?" (Hebrews 12:7-9). How can a parent say he or she loves his or her children and not discipline them? Children are inherently good but children are not always good. They do not always act with kindness unto others; they do not spring out as perfect and wise beings who know all right from all wrong or the good from the better from the best. Of course, it is possible for parents to be overbearing in their chastening and discipline but children need discipline and chastening. However, God is perfect - He does not make mistakes in His chastening of His children. God does not allow us to be tempted more than we are able to bear (see 1 Cor. 10:13), surely He will not chasten us more than we are willing to bear. The more we feeling we are being chastened by God - the more we may deserve it but also the more we can know that God knows that we can handle it as we trust in Him.