What did Pandit Nehru mean when he stated that the achievement being celebrated was 'an opening of opportunity'?

According to Jawaharlal Nehru, our Indian nation achieved its freedom after several struggles and still had many unsolved problems such as poverty, epidemic of diseases, unemployment, rehabilitation of Indian citizens (due to partition), religious differences etc. These problems had been persistent even before the freedom but there was no way of solving them. Hence the notion of a free India was not an achievement according to pundit Nehru but a step towards solving the problems as such an opportunity was not available earlier under the British rule. Hence, he stated that the achievement being celebrated was actually “an opening of opportunity”.