idea · concept · philosophy · theory

Adopt his concepts.

What I’m getting at is that Zamenhof not only built a linguistic object, but that behind that was an idea — an idea of brotherhood, a pacifist idea. That strength of an ideal — for which Esperantists were even persecuted under Nazism and Stalinism — is still conserved by the community of Esperantists. One cannot say that it has failed, but one thing needs to be said: the reason why any language is successful is always indefinable.

The concept doesn’t make sense.

We were founded upon the ideal that all are created equal, and we have shed blood and struggled for centuries to give meaning to those words – within our borders, and around the world.

The concept of “Internet addiction” implies that “the Internet” is some sort of definable activity.