Love, in this sense of an unlimited loving-kindness towards all others, is held to be the ultimate perfection of the human spirit, because it is said to both glorify and reflect the nature of God. In its most extreme form such love can be self-sacrificial. This love is necessary for salvation, and with it no one can be lost. Charity is comprised two parts, love of God and love of man, which includes both love of one's neighbor and one's self. Jesus Christ is the perfect example of charity. His crowning expression of charity was His infinite Atonement.
The stronger our hope, the purer our charity. The reason why charity never fails and the reason why charity is greater than even the most significant acts of goodness is that charity, “the pure love of Christ”, is not an act but a condition or state of being. Charity is something one becomes. "Charity Never Faileth". Charity encompasses all other godly virtues. When all else fails, charity—Christ’s love—will not fail.
"Charity suffereth long and is kind; charity envieth not; charity vaunteth not itself, is not puffed up, Doth not behave itself unseemly, seeketh not her own, is not easily provoked, thinketh no evil; Rejoiceth not in iniquity, but rejoiceth in the truth; Beareth all things, believeth all things, hopeth all things, endureth all things.Charity never faileth: but whether there be prophecies, they shall fail; whether there be tongues, they shall cease; whether there be knowledge, it shall vanish away". (1Cor 13:4-8)
If ye have not charity, ye are nothing, for charity never faileth. Wherefore, cleave unto charity, which is the greatest of all. … “Charity is the pure love of Christ, and it endureth forever.”