When I studied teaching with Li Bingnan in my early years, his old man's house taught me to study classics and teach seriously. Even if I can't get involved in teachings, I should at least understand them. Therefore, we regard Master Yinguang as the motto of our Jing Zong University, and "do our best, be honest, and pray for the pure land".
Among these sixteen words, the master sometimes uses "sincerely reciting Buddha" and sometimes uses "sincerely reciting Buddha", both of which are in Wen Chao. I think this must be because his old man's audience is different. Some listeners are novices. When they went to see the old monk, the master told them "I believe in Buddhism". If it is for old practitioners or Buddhist prayer halls, the master will say "honestly recite Buddha", because you have enough beliefs and desires, and you can honestly realize it. Therefore, for beginners, we should talk about "believing in Buddhism" and for old practitioners, we should talk about "sincere Buddhism"!