He said that Parti Keadilan Rakyat (PKR) advisor Anwar Ibrahim is the one most suitable for the job.
"I don't want to be the No 1 man although someone has have proposed it. I've always said that Anwar is the most suitable person because he has passed the physical and moral tests.
"If people appoint me, I will give it to him," he told reporters after opening the 11th symposium of the Malaysian Society of Applied Biology here.
He was asked to comment on a call by a delegate at the PAS muktamar last week that he be appointed Pakatan Rakyat spiritual leader because of his integrity and success in helming Kelantan for 20 years.
On the remark by a delegate that the Indian community likened him to India's revered leader, Mahatma Gandhi, Nik Aziz said that was alright but he could not accept the post of supreme leader of the opposition coalition.