Two former politicians reveal the realities of life in public office. They talk to Kim Chakanetsa about why they went into politics, what impact they had and why a thick skin is absolutely critical.

Dr Ngozi Okonjo-Iweala is a Nigerian economist who served two terms as finance minister of Nigeria from 2003 to 2006 and from 2011 to 2015, having previously been a managing director at the World Bank. But holding political office was never part of her plan. Instead she was appointed to the role by the then president. She became the first female finance minister in Nigeria. She says her father had always impressed upon her the importance of doing one's duty for one's country, but now she's left politics she enjoys the freedom of having more control over her life. She currently chairs the Global Alliance for Vaccines and Immunization (GAVI).

Lindiwe Mazibuko is a South African politician and former parliamentary leader of the Democratic Alliance. Lindiwe was elected to parliament aged 29, and was seen as a rising star of the party, but faced misogynistic attacks as her profile grew. She resigned her position in 2014, saying she wanted to pursue postgraduate studies at Harvard University in the US. She's now writing a book about young people and public office, but hopes to return to front-line politics in a few years' time.

Image: Dr Ngozi Okonjo-Iweala. Credit: Shaun Curry/AFP/GETTY IMAGES