Live each day as if it were your last.
Someday it will be true.
Ask yourself in the mirror
If you should do what you're going to do.

Many things that you have done before,
And have addicted you some way,
Would you want to be caught doing them
If an angel walked by your way?

I struggle with things I do today,
That I struggled with as a boy.
But giving them up seems impossible,
For I find comfort in them too, not joy.

Being familiar with unseemly things
Is a habit that I would break.
If only my faith was stronger,
I'd leave them behind, not take.

But I am just a mortal man.
And as such I sure am weak.
I need some strength and guidance.
Now I know Whom I should seek.

They who wait for the LORD shall renew their strength;    they shall mount up with wings like eagles; they shall run and not be weary;  they shall walk and not faint. Isaiah 40: 31

When I was 17, I read a quote that went something like: 'If you live each day as if it was your last, someday you'll most certainly be right.' It made an impression on me, and since then, for the past 33 years, I have looked in the mirror every morning and asked myself: 'If today were the last day of my life, would I want to do what I am about to do today? ' And whenever the answer has been 'No' for too many days in a row, I know I need to change something.
—Steve Jobs, Address at Stanford University (2005)

Robert Edgar Burns

http://www.poemhunter.com/poem/live-each-day-3/