The Prince of Wales used an address at Lambeth Palace on Monday to respond to criticism by cabinet ministers of his views on education.
The seminar brought together those involved in the Prince of Wales' charitable and voluntary interests together with Church of England bishops who have a particular interest in this field.
The Prince has rejected claims that he believes "people should not rise above their station” as "a travesty of the truth".
"Ambition is a good thing and should never be constrained by a person's starting point in life" said the Prince.
“People must be encouraged to fulfil their aspirations in ways that recognise their different abilities and talents. Thank God they do and that we are not all the same.”
Dr Williams said: "I am delighted to be able to hold this event here and to have the valuable perspective of the Prince of Wales. His extensive involvement in the charitable sector gives him a unique perspective on some of the issues that will be raised. This, together with the Church of England's own record in building and sustaining voluntary commitment to our society, will make for a fascinating and worthwhile engagement."
The Prince last visited Lambeth Palace in March 2000. On that occasion he formally opened the refurbished Atrium in preparation for public opening of the palace as part of the Millennium Celebrations.