It's Axiomatic

An axiom I heard once states: If you always do What you've always done, Then you'll always get What you always got. To paraphrase and reiterate: What's worse, Waking up one morning And realizing you're not What you hoped you'd be, Or realizing you still are What you always were? Tack on this wisdom to round out the plot: You can only do the best you can, So remember as you start each day, Tomorrow hasn't happened yet, And yesterday is best forgot.