White is a symbol for cleanliness, righteousness, and holiness. Being completely clean is necessary to be like the Savior. To have white garments symbolizes that a person is clothed in purity, or that purity is a characteristic of that individual. Such cleanliness is made possible only through the atoning sacrifice of Jesus Christ, in which His blood was shed for our sins.
President John Taylor (1808–87) spoke of the necessity of going beyond simply being members of the Lord’s Church if we are to be sufficiently worthy to stand before our Father in Heaven: “There is something that goes a little further than we think about sometimes; and that is, while we profess to be followers of the Lord, while we profess to have received the Gospel and to be governed by it, a profession will amount to nothing unless we have washed our robes and made them white in the blood of the Lamb. It is not enough for us to be connected with the Zion of God, for the Zion of God must consist of men that are pure in heart and pure in life and spotless before God, at least that is what we have got to arrive at. We are not there yet, but we must get there before we shall be prepared to inherit glory and exaltation; therefore a form of godliness will amount to but little with any of us. … It is not enough for us to embrace the Gospel … and be associated with the people of God, attend our meetings and partake of the Sacrament of the Lord’s supper, and endeavor to move along without much blame of any kind attached to us; for notwithstanding all this, if our hearts are not right, if we are not pure in heart before God, if we have not pure hearts and pure consciences, fearing God and keeping His commandments, we shall not, unless we repent, participate in these blessings about which I have spoken, and of which the Prophets bear testimony” (Teachings of Presidents of the Church: John Taylor [2001], 114–15).