'I wish to also devotedly serve the Holy Church of God in the future through a life dedicated to prayer'

From RadioVaticana.va, here's  the full statement of Pope Benedict on his resignation.

----------

Dear Brothers,

I have convoked you to this Consistory, not only for  the three canonizations, but also to communicate to you a decision of great  importance for the life of the Church.

After having repeatedly examined my conscience before God, I have come to the  certainty that my strengths, due to an advanced age, are no longer suited to an  adequate exercise of the Petrine ministry. I am well aware that this ministry,  due to its essential spiritual nature, must be carried out not only with words  and deeds, but no less with prayer and suffering. However, in today’s world,  subject to so many rapid changes and shaken by questions of deep relevance for  the life of faith, in order to govern the bark of Saint Peter and proclaim the  Gospel, both strength of mind and body are necessary, strength which in the last  few months, has deteriorated in me to the extent that I have had to recognize my  incapacity to adequately fulfill the ministry entrusted to me.

For this reason, and well aware of the seriousness of this act, with full  freedom I declare that I renounce the ministry of Bishop of Rome, Successor of  Saint Peter, entrusted to me by the Cardinals on 19 April 2005, in such a way,  that as from 28 February 2013, at 20:00 hours, the See of Rome, the See of Saint  Peter, will be vacant and a Conclave to elect the new Supreme Pontiff will have  to be convoked by those whose competence it is.

Dear Brothers, I thank  you most sincerely for all the love and work with which you have supported me in  my ministry and I ask pardon for all my defects. And now, let us entrust the  Holy Church to the care of Our Supreme Pastor, Our Lord Jesus Christ, and  implore his holy Mother Mary, so that she may assist the Cardinal Fathers with  her maternal solicitude, in electing a new Supreme Pontiff. With regard to  myself, I wish to also devotedly serve the Holy Church of God in the future  through a life dedicated to prayer.
From the Vatican, 10 February  2013

BENEDICTUS PP XVI