Refrain from defending your points. It all causes but emotional stress and turmoil. Fighting for your cause is a proof of weakness. If you can but love, no one ever can fight or argue with you. Discussions are a mental fight of the egos involved.
Truth is absolute and never can be discussed.
Anything that can be discussed lacks of truth and should be dropped. Truth can be understood and explained but never discussed. There is an absolute point to everything in life. Learn to see everything from that absolute point of view and leave others their opinion. Strive for the awareness of absolute truth in all your live.