• Christ’s Atonement, of course, is for super sinners and the midrange sinners and then good people who make a lot of mistakes but are not wicked! Each of these acts of drawing upon the Atonement requires us to put off the natural man.  I am persuaded that so much of taking up the cross daily –- daily, not quarterly or semiannually –-  consists of putting off the natural man (see Mosiah 3:19). Doing this involves some arduous isometrics -–  the old man working against the new spiritual man. That natural man, as you know, will not go quietly or easily. And even when he is put off, he has a way of hanging around, hoping to throw his saddle on us once again. (The Holy Ghost: Glorifying Christ, Ensign, July 2002, p. 56)

• As you pursue your discipleship and observe the human scene, do not be surprised or unnerved by the natural man’s relentless push for preeminence and power. (“The Pathway of Discipleship,” Ensign, Sept. 1998, p. 13) 

• Nor does the natural man or the natural woman go away quietly or easily. Hence the most grinding form of calisthenics we will ever know involves the individual isometrics required to put off the natural man. Time and again, the new self is pitted against the stubborn old self. Sometimes, just when at last we think the job is done, the old self reminds us that he or she has not fully departed yet. (“Becoming a Disciple,” Ensign, June 1996, p. 15)

Brigham Young

• As I have told you, your spirit is continually warring with the flesh; your spirit dictates one way, your flesh suggests another, and this brings on the combat. (Journal of Discourses, 3:212)

• When we receive the Gospel, a warfare commences immediately; Paul says, "for I delight in the law of God, after the inward man," but I see another law in my members warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members." We have to fight continually, as it were, sword in hand to make the spirit master of the tabernacle, or the flesh subject to the law of the spirit. If this warfare is not diligently prosecuted, then the law of sin prevails, and in consequence of this some apostatize from the truth when crossing the plains, learn to swear instead of to pray, become high-minded and high tempered instead of learning to be patient and humble, and when they arrive in these vallies they feel so self-sufficient that they consider themselves the only ones that are really right; they are filled with darkness, the authority of the Spirit is not listened to, and the law of sin and death is the ruling power in their tabernacles. (Journal of Discourses, 9:287-288)