Kalidasa

"Look to this day:

For it is life, the very life of life.
In its brief course
Lie all the varieties and realities of your existence.
The bliss of growth,
The glory of action,
The splendor of achievement
Are but experiences of time.

For yesterday is but a dream
And tomorrow is only a vision;
And today well-lived, makes
Yesterday a dream of happiness
And every tomorrow a vision of hope.

Look well therefore to this day;
Such is the salutation to the ever-new dawn!"

http://www.poetseers.org/spiritual_and_devotional_poets/india/kalidasa/kalidasa_poems/loo/