This question consists of six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences have been jumbled up and labelled as P, Q, R and S. Rearrange the sentences and choose the correct option.

S1: I have long laboured under a dark suspicion that I am an idle person.
S6: I defend myself by attacking myself and claim a verdict of not guilty by the candour of my confession of guilt.
P: If I had a chance to mention it in conversation, I do not expect to be believed.
Q: The art of defence is an attack.
R: I announce that I am idle, in fact, to prevent the idea spreading that I am idle.
S: It is an entirely private suspicion.