Om Swami
Why is self-discipline necessary for peace and happiness?
Self-restraint steadies the intellect
Without self-restraint the intellect cannot become steady. Without a steady intellect there is no meditation, without meditation no peace, and without peace no happiness. This is the gift of self-restraint: from grace, all sorrows end, the intellect becomes steady and peace is established.
One who has no self-restraint cannot have a steady mind. Without a steady mind there is no meditation. Without meditation there is no peace.