In leading the people or attending to nature, there is nothing better than moderation.
Only through practicing moderation can you quickly yield. To quickly yield depends upon your abundance of virtue, your abundance of virtue means nothing cannot be overcome, nothing that cannot be overcome means you know no limits, knowing no limits, you can thereby lead the state. To lead the state, be its mother, and you will last a long time.
This is called having deep roots, a solid trunk. Long life, enduring insight. It is the path.
(from Tao Te Ching, verse 59, translation by Robert Brookes)