From New Testament Institute Manual:

Paul pointed out that “charity suffereth long, and is kind” (1 Corinthians 13:4). When we have charity, we patiently endure offense or hardship. We also act in patience and kindness to everyone, even those who offend us. President Henry B. Eyring of the First Presidency taught: “We do not know the hearts of those who offend us. Nor do we know all the sources of our own anger and hurt. The Apostle Paul was telling us how to love in a world of imperfect people, including ourselves, when he said, ‘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’ (1 Cor. 13:4–5). And then he gave solemn warning against reacting to the fault of others and forgetting our own when he wrote, ‘For now we see through a glass, darkly; but then face to face: now I know in part; but then shall I know even as I am known’ (1 Cor. 13:12)” (“That We May Be One,” Ensign, May 1998, 68).

Paul observed that the knowledge available in this life is incomplete as compared with the perfect knowledge we will enjoy in eternity (see 1 Corinthians 13:12; 2 Nephi 9:13–14). He compared our current, imperfect knowledge to viewing a person’s image in the imperfect reflection of a metal mirror. He then compared perfect eternal knowledge to the clarity of seeing that same person “face to face” (1 Corinthians 13:12).

Elder Neal A. Maxwell, who said, ‘What we already know about God teaches us to trust him for what we do not know fully’ (Deposition of a Disciple [Salt Lake City: Deseret Book, 1976], 56).

The Apostle Paul taught that three divine principles form a foundation upon which we can build the structure of our lives. They are faith, hope, and charity. (See 1 Cor. 13:13.) Together they give us a base of support like the legs of a three-legged stool. Each principle is significant within itself, but each also plays an important supporting role. Each is incomplete without the others. Hope helps faith develop. Likewise true faith gives birth to hope. When we begin to lose hope, we are faltering also in our measure of faith. The principles of faith and hope working together must be accompanied by charity, which is the greatest of all. According to Mormon, “charity is the pure love of Christ, and it endureth forever.” (Moro. 7:47 

Working together, these three eternal principles will help give us the broad eternal perspective we need to face life’s toughest challenges, including the prophesied ordeals of the last days. Real faith fosters hope for the future; it allows us to look beyond ourselves and our present cares. Fortified by hope, we are moved to demonstrate the pure love of Christ through daily acts of obedience and Christian service.