One of the most famous stories of courage is when young David, son of Jesse, stood against the titanic Goliath of Gath. David had no armor, and no large weapons, and his very appearance was taken by the giant as an insult.
"And when the Philistine looked about, and saw David, he disdained him: for he was but a youth, and ruddy, and of a fair countenance. And the Philistine said unto David, Am I a dog, that thou comest to me with staves? And the Philistine cursed David by his gods. And the Philistine said to David, Come to me, and I will give thy flesh unto the fowls of the air, and to the beasts of the field." (1 Samuel 17:42-44)
David had confidence that the strength and experience of this massive man of war was no match for the power of the Lord... and he did not cower away at the giant's threats:
"Then said David to the Philistine, Thou comest to me with a sword, and with a spear, and with a shield: but I come to thee in the name of the Lord of hosts, the God of the armies of Israel, whom thou hast defied. This day will the Lord deliver thee into mine hand; and I will smite thee, and take thine head from thee; and I will give the carcases of the host of the Philistines this day unto the fowls of the air, and to the wild beasts of the earth; that all the earth may know that there is a God in Israel. And all this assembly shall know that the Lord saveth not with sword and spear: for the battle is the Lord’s, and he will give you into our hands." (1 Samuel 17:45-47)
The scriptures indicate that David then ran toward the giant. Using his sling, he knocked Goliath down, and then finished the job with the Philistine's own sword.
Perhaps one of the reasons this story is so popular is because it shows that there is no problem too big for the Lord to solve. The righteous have no need to fear, because God will protect them, and even if he doesn't, he will make things right in the end. Confederate General Stonewall Jackson said:
"Captain, my religious belief teaches me to feel as safe in battle as in bed. God has fixed the time for my death. I do not concern myself about that, but to be always ready, no matter when it may overtake me....That is the way all men should live, and then all would be equally brave."
A story that is far less famous from the life of David came later, as he fled from the wrath of jealous King Saul:
"And David arose, and fled that day for fear of Saul, and went to Achish the king of Gath. And the servants of Achish said unto him, Is not this David the king of the land? did they not sing one to another of him in dances, saying, Saul hath slain his thousands, and David his ten thousands? And David laid up these words in his heart, and was sore afraid of Achish the king of Gath. And he changed his behaviour before them, and feigned himself mad in their hands, and scrabbled on the doors of the gate, and let his spittle fall down upon his beard. Then said Achish unto his servants, Lo, ye see the man is mad: wherefore then have ye brought him to me? Have I need of mad men, that ye have brought this fellow to play the mad man in my presence? shall this fellow come into my house?" (1 Samuel 21:10-15)
Instead of boldly announcing that the Lord would overcome the Philistines in Gath, he pretended insanity to be ignored by them. Where was the courage of his youth?
Of course, here was a situation in which common sense was required. With no safe refuge in his home, he needed to be able to go unnoticed in the land of the Philistines.
Perhaps the contrasting circumstances led the preacher to conclude this:
"To every thing there is a season, and a time to every purpose under the heaven: A time to be born, and a time to die; a time to plant, and a time to pluck up that which is planted; A time to kill, and a time to heal; a time to break down, and a time to build up; A time to weep, and a time to laugh; a time to mourn, and a time to dance; A time to cast away stones, and a time to gather stones together; a time to embrace, and a time to refrain from embracing; A time to get, and a time to lose; a time to keep, and a time to cast away; A time to rend, and a time to sew; a time to keep silence, and a time to speak; A time to love, and a time to hate; a time of war, and a time of peace." (Ecclesiastes 3 1-8)
Being able to know what God wants by hearing his voice (Matthew 16:17) or by recognizing his servants (Matthew 10:41) is critical in knowing what is right. When the will of God is being discovered, God expects his children to use common sense (1 Kings 19:11). When a man learns what God would have him do, let that man's heart be filled with confidence and courage (1 Nephi 3:7).