Ask the meaning of a poem

Guo, who signed a contract in the 1980s, avoided seeing Tubo sign a contract and went straight to the mountains to learn immortals. I'm afraid that as soon as the emperor announced it, the sky was always on, and the ambition was to spread all over the world. Explain in detail:

This sign means "take the lead". Encourage the parties to be selfless in everything. In today's society, people get along more and more coldly. With the emergence of fraud cases, most people just want to protect themselves and are often unwilling to lend a helping hand. But there is another kind of person who only thinks about what he can help, and he will try his best to do it, regardless of the gains and losses of interests, and of course he will not think of himself. Most of these people are volunteers and can be called living buddhas on earth. You should know that although your personal strength is weak, as long as you are willing to do it, turn passive thoughts into active actions, take the lead in everything, don't ask about your own selfish interests, and don't care whether you can get rewards, I believe you will definitely bring unspeakable real happiness to your heart.