YISUN was questioned once by their disciples at their speaking house. The questions were the following:

‘What is the ultimate reason for existence?’

To which YISUN replied, ‘Self-deception.’

‘How can a man live in perfect harmony?’

To which YISUN replied, ‘Non-existence.’

‘What is the ultimate result of all action?’

To which YISUN replied, ‘Futility.’

‘How best can we serve your will?’

To which YISUN replied, ‘Kindly ignore my first three answers.’