This quote belongs to Nelson Rolihlahla Mandela (1918 – 2013).
You live in the present. Do not dwell on the past. Learn from the past to help you solve the problems in the present. Prepare for the future. Be ready for the opportunities that will come your way. Put into practice this way of thinking – banish the negative thoughts and substitute them with new productive ones. You will learn to anticipate the future and create the positive life that you desire!