In 649 A.D. Tang Xuanzang (aka Tang Tripitaka) first wrote The Maha Prajna Paramita Hrdaya Sutra (abbreviation, The Heart Sutra) in the Tang Dynasty Chinese language. Soon after, he wrote a Sanskrit version. The Chinese version was widely translated into Japanese, Korean and Vietnamese languages. Meanwhile, the Sanskrit version was translated to Hindi, Tibetan, English and other languages.
First, The Heart Sutra Mantra is the perfect wisdom to enlighten both the thoughts of all human beings and the consciousness Of all sentient beings to have pure compassion and loving kindness, and to perform righteous deeds according to the Dharma teachings. These noble deeds summarily enable them to activate their Bodhi light to the heavenly realms.
As everything in this world is changing, there is nothing one can possess or hold onto continually. When one's mind is at peace With the happenings around him, there shall be peace in one's heart and the entire universe shall be in harmony with him.
Second, for the same reason, all sentient beings should rest and let go of the worldly affairs, thereby, successfully free themselves from sufferings by way of nirvana, where they return to the realm of Lord Lokeshvara, or Bodhisattva Guanyin.
Indeed, all sentient beings are true spiritual travelers and should not have any plan, especially the idea to revisit the mundane world, through reincarnation.
May, all beings be well and happy.