The Story of Suddhipanthaka
Suddhipanthaka was in the group of people that represents foolishness and dull capacity. His foolishness and dull capacity were the workings of the law of cause and effect. He was also in the group that was diligent in eliminating karmic obstacles.
He was the slowest of the Buddha’s students and had the poorest memory. When he was taught a four-line verse, he could not memorize the lines even after several days of trying to learn them. When he chanted the first line, he forgot the next lines. When he was taught the second line, he forgot the first line.
His elder brother, also a monastic, told him that he was too slow to learn from the Buddha and that he should go home. Suddhipanthaka burst into tears. The Buddha saw this and asked Suddhipanthaka why he was crying. He told the Buddha that his brother wanted him to go home.
The Buddha told him to stay and gave him a broom. He then taught Suddhipanthaka to concentrate on the broom and sweep the floor every day. As he swept, Suddhipanthaka was to repeat just two words, “sweep” and “clean.”
Before long, Suddhipanthaka attained enlightenment and arhatship. The other monastics wondered how he had accomplished this. The Buddha said that Suddhipanthaka had been a highly accomplished Dharma master in the previous lifetime. But he always held back when he gave lectures because he was afraid that others would surpass him in their achievement if he taught everything he knew. His slowness in this lifetime was a karmic result of teaching grudgingly.
I love this tale. Thanks @Margaret_Scott, I am in your dept!