Learning to leave his mind in meditation could be compared to snorkelling, which is breathing with his face under water. Which is just wrong!
It had taken a lot of time and nagging for his brain to get used to snorkelling, for all those doubts and questions to be overcome - for him to relax and just breathe.
Learning to leave his mind in meditation was the same kind of challenge; when there was a gap in his thoughts, when a space opened up, to resist the temptation to immediately fill it up - instead for him to relax and just breathe.
— Matt Padwick
breathchallengemeditation