Walk in the spirit so that you will not fulfil the lust of the flesh. Not pray in the spirit. Not fast in the spirit but walk. There is lust in the flesh. You cannot remove them but you can deny them and subdue them so that you will not fulfil them. Many struggle because they are trying to pray in the spirit so after speaking in tongues they still find themselves in untold sins. But walk walk walk it means to do everything by the word. It means to guard your thoughts and words and steps. Galatians 5:16.