And this is a thing I can't help.

I can't help being master of the horse.' 'If only we could learn how to use our will,' said Hermione, 'we could do anything.

The will can cure anything, and put anything right.

That I am convinced of--if only we use the will properly, intelligibly.' 'What do you mean by using the will properly ?' said Birkin.
'A very great doctor taught me,' she said, addressing Ursula and Gerald vaguely.

'He told me for instance, that to cure oneself of a bad habit, one should FORCE oneself to do it, when one would not do it--make oneself do it--and then the habit would disappear.' 'How do you mean ?' said Gerald.
'If you bite your nails, for example.