Even as water flows through a pipe, we recognize the pipe and the water to be separate. We say ‘the water flows through the pipe’, or ‘the pipe has water’.
It is quite the same when we think or feel. Thoughts and emotions may flow through us, but are inherently separate from us. Yet, our language doesn’t reflect this. We don’t say ‘anger flows through me’, or that ‘I have anger’. Instead we say I am angry. But saying that we are a fleeting feeling is as absurd as saying the ‘pipe is water’.
Separate your self from your thoughts and feelings. Those things will pass. You will persist.