More than nine years since South Africa's first black President Nelson Mandela died, he remains to be "a giant of our time" and "moral compass" for the whole world, said UN Secretary General Antonio Guterres.

Guterres made the remarks on Sunday ahead of the Nelson Mandela International Day, marked annually on July 18 in honor of the anti-apartheid icon.

The UN chief described Mandela as "a leader of unparalleled courage and towering achievement; and a man of quiet dignity and deep humanity."

He urged the world to take inspiration from the former South African president in the quest to rid the world of many vices.

"Our world today is marred by war; overwhelmed by emergencies; blighted by racism, discrimination, poverty, and inequalities; and threatened by climate disaster. Let us find hope in Nelson Mandela's example and inspiration in his vision," said Guterres.

He noted that by working in unity and following Mandela's example, the world can become "more just, compassionate, prosperous, and sustainable for all."

The Nelson Mandela International Day, declared by the UN General Assembly in November 2009, recognizes Mandela's values and his dedication to the service of humanity in conflict resolution, race relations, reconciliation and the promotion of social justice.