Tell means "to relate in detail; to give utterance to," while teach means "to cause to know something; to cause to know how." Telling requires nothing on the part of the audience. In fact, it doesn't require an audience at all. You can tell a recorder or you can tell thin air. Teaching, by contrast, requires learning. Thus, teaching requires both a teacher and a learner.
Selecting a successor to your managing partner is a tricky business. What key abilities should you seek?
We all know "word-of-mouth" is a highly effective way to acquire new clients. It's your favorite way to get new clients, right? The phone rings or the email chimes and, "Presto!" You have a new client! If you're doing quality work and taking excellent care of your clients, these unsolicited clients arrive with increasing frequency through your career. But, you don't have to wait and wonder who will call.