The Plan of Salvation = The Great Plan of Happiness

My favorite depiction of the Plan of Salvation

"The three pillars of eternity, the three events, preeminent and transcendent above all others, are the creation, the fall, and the atonement. These three are the foundations upon which all things rest. Without any one of them all things would lose their purpose and meaning, and the plans and designs of Deity would come to naught.

"If there had been no creation, we would not be, neither the earth, nor any form of life upon its face. All things, all the primal elements, would be without form and void. God would have no spirit children; there would be no mortal probation; and none of us would be on the way to immortality and eternal life.

"If there had been no fall of man, there would not be a mortal probation. Mortal man would not be, nor would there be animals or fowls or fishes or life of any sort upon the earth. And, we repeat, none of us would be on the way to immortality and eternal life.

"If there had been no atonement of Christ, all things would be lost. The purposes of creation would vanish away. Lucifer would triumph over men and become the captain of their souls. And, we say it again, none of us would be on the way to immortality and eternal life.

"And so I now say: Come and let us reason together; let us reason as did righteous men of old that we may come to understanding.

"Come and hear us declare sound doctrine; let us declare it plainly and in power as do the angels of God in heaven.

"Come and let us testify of those things which God has made known to us; let us testify as do those whose souls are afire with the Spirit and who know by revelation of the truth and verity of their spoken word."

(See Bruce R. McConkie: The Three Pillars of  Eternity)