This sentence means that you should not cling to anything, don't take it to heart, let bygones be bygones, don't be frightened, stay away from paranoia, and get a perfect Buddha's fruit.

from the Prajna Paramita Heart Sutra.

The whole sentence is: Bodhisattva, according to Prajna Paramita, has many reasons, and his heart is not in the way. No obstacles, no terror, stay away from the inverted dream, what nirvana.

Vernacular translation: Since there is no truth to be grasped by wisdom, Bodhisattva's practice should demonstrate this situation of getting nothing, which is the original intention of following Prajna Paramita's practice of dharma.

Because Prajna Paramita can do everything, I feel at ease in my heart, and I have no worries and obstacles, so I have no fear of terror, and I have abandoned the upside-down thinking about everything, abandoned the fantasy about the situation of all beings, and reached the nirvana. Extended information

Explanation of Heart Sutra:

Although Heart Sutra contains many Buddhist words, if understood as a whole, the key point is to explain the emptiness of everything in the world. "Prajna" is the wisdom in Chinese, and "Paramita" is the other side of our understanding, that is, the truth of life.

The Heart Sutra means that the situation we are in and all the material phenomena we see are changing. We don't need to be obsessed with the quality of the present and look at things from our own standpoint. We should let go of our obsession with things outside our bodies and abandon all false delusions, so that we can get rid of the pain and get happy.

Baidu Encyclopedia-Prajnaparamita's Heart Sutra