Discipline is freedom because being disciplined is an option. If you like you can be disciplined but if you’re not, you would be excluded from society. You would be different but it would be bad difference. People can be disappointed from you.
Discipline is freedom because it is the way that where we can find freedom. If we would disciplined, we would find freedom. So being disciplined is so important.
Discipline is freedom because it is the way that we can go to success and being successful is equal to being free. So be disciplined if you would disciplined you would do everything and it mean that you would be free.