Guard well within yourself that treasure, kindness. Know how to give without hesitation, how to lose without regret, how to acquire without meanness.

In this quote, the speaker is suggesting that we should value kindness and generosity within ourselves. They are advising us to give what we can to others without hesitating or expecting anything in return, to accept when we lose something or someone without feeling too upset, and to gain something without being greedy. By keeping this mindset, we will be able to lead a fulfilled life.