This is meditation in action, the discipline of daily life. Trungpa says to continue the experience of meditation in your daily activities, remembering that all this stuff that seems to be going on is, at least as understood on the absolute level, just an illusion created by your mind-system.
Remember to keep everything soft, pliable, workable, with lots of space. Recognize the simplicity of the phenomenal play.
The phrase “child of illusion” has always been hard for me to understand. My best take on it: – it suggests that you – that notion of ‘self’ that is identified as ‘you’ – are created by (child of) the illusion of experience. To ‘be’ that, perhaps, means you recognize it clearly.