In Matthew 6:34 (New International Version), Jesus said, "Therefore do not worry about tomorrow, for tomorrow will worry about itself." So many times we waste away the opportunities of today because we're looking behind to the past or hoping for a better tomorrow.
Look to this day
For it is life
The very life of life
In its brief course
Lie all the realities and truths of existence
The joy of growth
The splendor of action
The glory of power
For yesterday is but a memory
And tomorrow is only a vision
But today well lived
Makes every yesterday a memory of happiness
And every tomorrow a vision of hope
Look well therefore to this day.