"What does it mean to be valiant in the testimony of Jesus?"It is to be courageous and bold; to use all our strength, energy, and ability in the warfare with the world; to fight the good fight of faith. … The great cornerstone of valiance in the cause of righteousness is obedience to the whole law of the whole gospel."To be valiant in the testimony of Jesus is to ‘come unto Christ, and be perfected in him’; it is to deny ourselves ‘of all ungodliness,’ and ‘love God’ with all our ‘might, mind and strength.’ (Moro. 10:32.)"To be valiant in the testimony of Jesus is to believe in Christ and his gospel with unshakable conviction. It is to know of the verity and divinity of the Lord’s work on earth."But this is not all. It is more than believing and knowing. We must be doers of the word and not hearers only. It is more than lip service; it is not simply confessing with the mouth the divine Sonship of the Savior. It is obedience and conformity and personal righteousness. …"To be valiant in the testimony of Jesus is to 'press forward with a steadfastness in Christ, having a perfect brightness of hope, and a love of God and of all men.' It is to ‘endure to the end.' (2 Ne. 31:20) It is to live our religion, to practice what we preach, to keep the commandments. It is the manifestation of 'pure religion’ in the lives of men; it is visiting ‘the fatherless and widows in their affliction’ and keeping ourselves 'unspotted from the world.’ (James 1:27.)"To be valiant in the testimony of Jesus is to bridle our passions, control our appetites, and rise above carnal and evil things. It is to overcome the world as did he who is our prototype and who himself was the most valiant of all our Father’s children. It is to be morally clean, to pay our tithes and offerings, to honor the Sabbath day, to pray with full purpose of heart, to lay our all upon the altar if called upon to do so."To be valiant in the testimony of Jesus is to take the Lord's side on every issue. It is to vote as he would vote. It is to think what he thinks, to believe what he believes, to say what he would say and do what he would do in the same situation. It is to have the mind of Christ and be one with him as he is one with his Father" (in Conference Report, Oct. 1974, 45–46; or Ensign, Nov. 1974, 35).
"There are even many members of the Church who are lax and careless and who continually procrastinate. They live the gospel casually but not devoutly. They have complied with some requirements but are not valiant. They do no major crime but merely fail to do the things required—things like paying tithing, living the Word of Wisdom, having family prayers, fasting, attending meetings, serving. Perhaps they do not consider such omissions to be sins, yet these were the kinds of things of which the five foolish virgins of Jesus’ parable were probably guilty. The ten virgins belonged to the kingdom and had every right to the blessings—except that five were not valiant and were not ready when the great day came. They were unprepared through not living all the commandments. They were bitterly disappointed at being shut out from the marriage—as likewise their modern counterparts will be... Because men are prone to postpone action and ignore directions, the Lord has repeatedly given strict injunctions and issued solemn warnings. Again and again in different phraseology and throughout the centuries the Lord has reminded man so that he could never have excuse. And the burden of the prophetic warning has been that the time to act is now, in this mortal life. One cannot with impunity delay his compliance with God’s commandments." (Spencer W. Kimball, Miracle of Forgiveness, pp. 7–10.)
"Investigators are not only hearing our testimony of Christ, but they are hearing echoes of other, earlier testimonies, including their own testimony of Him, for they were on the side of the faithful who kept their first estate and earned the privilege of a second estate. We must always remember that these investigators, every man, woman, and child, were among the valiant who once overcame Satan by the power of their testimony of Christ! So when they hear others bear that witness of Christ’s saving mission, it has a familiar feeling; it brings an echo of truth they themselves already know" - Jeffrey R. Holland