Powerful speeches are those that appeal to audiences' emotions

A team leader speaks to her members during a business meeting. [Getty Images]

Nitin Nohria, Dean at Harvard Business School, says "Communication is the real work of leadership".

Perhaps, one of the most critical responsibilities of leaders of any organisation is public speaking. Be it a political, religious, business or educational institution, the leaders are constantly called upon to communicate their visions, policies and objectives of the organisation.