We can judge whether or not we have sufficient charity by whether we pray on behalf of others. Mormon both lived this principle and taught it, charity is the pure love of Christ, and it endureth forever…Wherefore, my beloved brethren, pray unto the father with all the energy of heart, that ye may be filled with this love (Moroni 7:47-8). We don’t doubt but that Mormon had been filled with this love for his task was to love a people who deserved it the least. They had been given everything yet remained in open rebellion against the truth. Nevertheless, the charity in Mormon’s heart was as Nephi before him who said, I pray continually for them by day, and mine eyes water my pillow by night, because of them; and I cry unto my God in faith, and I know that he will hear my cry (2 Nephi 33:3). The only difference between the prayers of Nephi and Mormon was that Mormon couldn’t pray with faith, for he knew his people were past feeling, concluding, I cannot recommend them unto God lest he should smite me (Moroni 9:20-1).