In plain words
The mind will not let go of its longing for objects; it is more restless than a monkey. Hold it in without letting go, and set it firmly in the state that is void of all. By that one reaches nirvana. Accept this.
Word for word
Restrain without lapse the mind that does not relinquish desire for objects and is more restless than a monkey. Establishing it in the state free of all objects, by that one attains nirvana. Accept this.