Brigham Young
"When you are in the spirit world, everything there will appear as natural as things now do. Spirits will be familiar with spirits in the spirit world—will converse, behold, and exercise every variety of communication with one another as familiarly and naturally as while here in tabernacles. There, as here, all things will be natural, and you will understand them as you now understand natural things. You will there see that those spirits we are speaking of are active; they sleep not. And you will learn that they are striving with all their might—laboring and toiling diligently as any individual would to accomplish an act in this world" (Teachings of Presidents of the Church: Brigham Young, p. 281).