So I have heard. At one time the Buddha was staying near Sāvatthī in Jeta’s Grove, Anāthapiṇḍika’s monastery. There the Buddha addressed the mendicants, “Mendicants!” “Venerable sir,” they replied. The Buddha said this:

“Mendicants, when a mendicant has not given up five kinds of hard-heartedness and severed five shackles of the heart, it’s not possible for them to achieve growth, improvement, or maturity in this teaching and training.

What are the five kinds of hard-heartedness they haven’t given up? Firstly, a mendicant has doubts about the Teacher. They’re uncertain, undecided, and lacking confidence. This being so, their mind doesn’t incline toward keenness, commitment, persistence, and striving. This is the first kind of hard-heartedness they haven’t given up.

Furthermore, a mendicant has doubts about the teaching … This is the second kind of hard-heartedness.

They have doubts about the Saṅgha … This is the third kind of hard-heartedness.