Heber J. Grant said this quote

I would sooner have the approval of my own conscience and know that I had done my duty than to have the praise of all the world and not have the approval of my own conscience. A man's own conscience, when he is living as he should live, is the finest monitor and the best judge in all the world. Men can accuse you of wrong-doing, and it has no effect at all if you know they lie and you have done that which is right

~ Heber J. Grant

There is but one path of safety to the Latter-day Saints, and that is the path of duty. It is not testimony, it is not marvelous manifestations, it is not knowing that the Gospel of Jesus Christ is true, . . . it is not actually knowing that the Savior is the Redeemer, and that Joseph Smith was His prophet, that will save you and me, but it is the keeping of the commandments of God, the living the life of a Latter-day Saint. [Heber J. Grant, Improvement Era, November 1936, p. 659] Quoted in “Waiting Upon the Lord” By Henry B. Eyring, BYU Speeches, 30 Sept 1990

~ Heber J. Grant

What I count as real prosperity... is the growth in a knowledge of God, and in a testimony, and in the power to live the gospel and to inspire our families to do the same. That is prosperity of the truest kind.

~ Heber J. Grant

Every living soul among the Latter-day Saints that fasts two meals once a month will be benefited spiritually and be built up in the faith of the gospel of the Lord Jesus Christ - benefited spiritually in a wonderful way - and sufficient means will be in the hands of the bishops to take care of all the poor.

~ Heber J. Grant