Language Point 28

Anywhere you can be with your thoughts undisturbed, you'll find ideas emerge freely. (Para. 10)
Meaning: In any place you can think without being disturbed, good ideas will come to you freely.
Other examples of the use of "with" followed by past particle:
All the afternoon he worked with the door locked.
整个下午他都闭门工作。
She sat with her head bent.
她低头而坐。
She could not leave with her duty still not done.
她不能任务没有完成就离开。