look well to this day

It was suggested that I google the poem, why didn't I think of that ? So I did. the longer version is as follows.
"Look well to this day, for it is life, the very life of life.
In it lies all the realities and verities of existence: *
the bliss of growth, the glory of action, splendour of beauty.
For yesterday is but a dream, and tomorrow only a vision.
But today well lived makes every yesterday a dream of happiness
and every tomorrow a vision of hope.
Look well, therefore, to this day, for it and it alone is life.
Such is the salutation of the dawn.
Another translation has at this point * Joy of growth, splendor of action, glory of power instead of "bliss of growth" etc.
Apparently it is an ancient Sanskrit Proverb.