From Daughters In My Kingdom chapter 10:
President Henry B. Eyring, a counselor in the First Presidency, explained that this true charity is the legacy of Relief Society:
“I will speak to you … of the great legacy those who went before you in the Relief Society have passed on to you. The part … which seems to me most important and persistent is that charity is at the heart of the society and is to come into the heart, to be part of the very nature, of every member. Charity meant to them far more than a feeling of benevolence. Charity is born of faith in the Lord Jesus Christ and is an effect of His Atonement working in the hearts of the members. …
“This society is composed of women whose feelings of charity spring from hearts changed by qualifying for and by keeping covenants offered only in the Lord’s true Church. Their feelings of charity come from Him through His Atonement. Their acts of charity are guided by His example—and come out of gratitude for His infinite gift of mercy—and by the Holy Spirit, which He sends to accompany His servants on their missions of mercy.”
This legacy of charity began with the sisters in Nauvoo, who engaged in organized charitable works and received temple covenants. It continued in Winter Quarters and along the arduous trail to the Salt Lake Valley. It sustained Latter-day Saint women as they settled frontier communities, endured political persecution and world wars, and maintained hope during economic depression. It has inspired loving-kindness at home and outreach efforts worldwide. It has motivated Relief Society sisters as they have served in hospitals and as they have helped with adoptions, wheat storage, humanitarian aid, and welfare. The pure love of Christ continues to motivate Relief Society sisters today as they gather to teach and serve one another and as they strengthen and watch over each other one by one.