If there is a closed door, knock, it might open. Or it might not. But you will never know till you knock.
And if you knock, and there is no answer – maybe you need to knock harder. If you knock again, and it still remains closed – maybe there is nobody there. If you knock a third time and there is still no movement – surely, nothing is there. Or maybe they don’t want to open. So stop disturbing.
‘ If someone isn’t meeting you half way… leave them be.’