"すべての人に礼儀正しくしかし親密になる相手は少数に"

Simplified Meaning:

Being kind and polite to everyone you meet is important because it shows respect and helps build good relationships. However, you don't need to share everything about yourself with everyone. Think of it like having many acquaintances but only a few close friends. Imagine you're in school and you say hello to all your classmates and treat them nicely. This makes the school a friendly place, and people will likely treat you well in return. However, you might choose just a few of those classmates to trust with your secrets and personal stories. This way, you protect your privacy and emotions while still spreading kindness and being friendly to others. By being selective about who you get close to, you ensure that your deeper connections are with people you truly trust. This keeps you from getting hurt by those who might not have the best intentions. In your daily life, be friendly and respectful to everyone, but save your personal stories and serious conversations for your trusted few.