The phrase "pass into" refers to the act of moving from one state or place to another. Synonyms for "pass into" include "enter," "move into," "cross over," "transcend," and "transition." "Enter" is used to describe the act of stepping into a new state or place. "Move into" implies a gradual shift or progression from one state to another. "Cross over" refers to passing from one side to another, often in a physical sense. "Transcend" and "transition" both imply a significant change or transcendence to a new state or level. The synonyms for "pass into" can be used interchangeably depending on the context and desired tone of the text.