He that humbles himself shall be preserved entire. He that bends shall be made straight. He that is empty shall be filled. He that is worn out shall be renewed. He who has little shall succeed. He who has much shall go astray.
How can a man's life keep it's course If he will not let it flow, Those who flow as life flows know They need no other force: They feel no wear, they feel no tear, They need no mending, no repair.
So sometimes things are ahead and sometimes they are behind; Sometimes breathing is hard, sometimes it comes easily; Sometimes there is strength and sometimes weakness; Sometimes one is up and sometimes down. Therefore the sage avoids extremes, excesses, and complacency.
The fourth (of the four cardinal virtues) is supportiveness: this manifests as service to others without expectation of reward. (Paraphrased: Such service is not a mere conforming to some external rule of behavior, but instead a manifestation of your original nature).
The past has no power to stop you from being present now. Only your grievance about the past can do that. What is grievance? The baggage of old thought and emotion.