37 I have taken into account, in reaching my conclusion, the applicant's psychological disorder, including his traumatic experience in prison when he was approximately 19 years of age, and the effect this has on the operation of the relevant sentencing principles and the sentencing disposition. These matters were dealt with by her Honour in her comprehensive sentencing remarks, in which she explored with particular care the applicant's psychological disorder. But, in the end, I found that the aggravating factors and applicable sentencing principles, balanced against the mitigating circumstances, required the imposition of sentences that are no less than those I have stated. The aggravating matters include the following. First, as Ms Cannon correctly pointed out, the applicant's mental state and behaviour were, to a material extent, self-induced by the intake of alcohol and drugs, and the assaults were committed in a context where the applicant terrorised the victims. Moreover, the offences were committed while he was on parole, and his long and serious criminal history must be balanced against the matters put on his behalf going to rehabilitation. I consider that the offence that is the subject of count 3, which involved the use of a knife, was a serious offence which warrants a sentence greater than that imposed on count 1. Arson is obviously a very serious offence attracting, as it does, a maximum penalty of 15 years' imprisonment. The circumstances of the offending were also very serious. The consequences of it were that the house was destroyed and the victim, who had befriended, and given shelter to the applicant, lost all her possessions in the fire. In the circumstances, I have concluded that a sentence of imprisonment of not less than three years and six months is appropriate for that offence.