Happy is the person who knows what to remember of the past, what to enjoy in the present, and what to plan for in the future.

The diseases of the present have little in common with the diseases of the past save that we die of them

Look not mournfully into the past, it comes not back again. Wisely improve the present, it is thine. Go forth to meet the shadowy future without fear and with a manly heart.

Most of your reactions are echoes from the past. You do not really live in the present.

The present is the necessary product of all the past, the necessary cause of all the future

The 20th century has been a century of bloodshed. The present century, because of our past experience, should be a century of peace. The new shapers of the planet are you, the young children.