Hard Lessons

Everybody loves to preach to the choir. No arguments, disagreements or misunderstandings come from that. You also don't make any meaningful progress.

No, you don't make any breakthroughs until you start bringing your ideas to people who don't agree with you. Their point of view can help you see what you're missing because they'll try to find every hole and mistake. If you realize you don't need to win every argument, you'll be able to learn from it.