The athlete is reminded that while he claims to have "lost everything", he still has his life - unlike Reeva Steenkamp.

The cliche "what a difference a day makes" could not be more apt than when describing the dramatic reversal of fortune for Oscar Pistorius.

Twenty-four hours before shooting girlfriend Reeva Steenkamp, the athlete had sponsorship deals worth millions, with many more in the pipeline and was revered around the globe.

His agent said that to call his future bright then "would be an understatement" and he was guaranteed financial security up to his planned sporting retirement.

A day later, his girlfriend was dead, his reputation was in tatters, he was arrested for murder and a return to his sporting career and therefore his livelihood was uncertain.

Now, his agent told the Pretoria court on the first day of Pistorius' sentencing hearing, he had no sponsorship deals at all.

But he insisted the runner still had much to contribute in the way of charity work and this would be his way of contributing to society.

A jail term would rob him of that opportunity, he said. He described an individual who was - before the killing - on the brink of setting up his own Foundation to help others who were similarly disabled.

The shooting meant all that had to be put on hold.

The athlete's legal team has been arguing that the double amputee should spend three years under house arrest at his uncle's home in Pretoria rather than be sent to prison.

They want him to do two days' community service a month (two eight-hour days) for the killing of his model girlfriend, which could involve working at a museum or cleaning in a local hospital.

It was a possible sentence the prosecutor called "shockingly inappropriate" for a man who'd killed another human being.

The psychologist who has been counselling the runner for the past 18 months said the athlete had initially at times been so overcome with emotion that she'd spent much of the time at the beginning just holding him as he sobbed.

The prosecutor suggested that Dr Lore Hartzenberg had got too close to the athlete and her report was, therefore, biased.

He reminded her she'd been spotted crying as the athlete gave evidence during his trial.

"He is a broken man who has lost everything," the doctor said.

"Yes, but he is still alive," Mr Nel retorted.

"Alive to live and love again. Reeva Steenkamp is dead."

Mr Nel reiterated the impact Reeva's death had had on her family and friends.

The state has yet to call its witnesses but the National Prosecuting Authority says there will be an impact statement detailing the life-changing implications for her family.

Her mother has said in several newspaper interviews she relied on her daughter for financial support. Her father Barry suffered a stroke as a result of the tragedy.

The defence has said it has one remaining witness to call, while state prosecutors indicated they may have two witnesses.

The two advocates will each summarise the evidence given by their witnesses and the judge is expected to retire for a short time - possibly a couple of days -  before pronouncing what punishment she believes is apt for the runner.

The idea of house arrest for taking the life of another has gone down very negatively among some of those who've been following the sentencing hearing.

In South Africa, such are the country's laws protecting endangered species, if the athlete had shot a rhino dead, he would have been jailed for between 10 and 77 years.

If he'd killed a lion, he would have faced a 15-year jail term. But for shooting dead a young woman, there's no minimum sentence for the conviction of culpable homicide.