What Is the Spiritual Gift of Speaking in Tongues and Why Is It Useful?

A message from "The DarkGlass Series" at The Methodist Voice youtube channel:

https://www.youtube.com/channel/UCKMhdeSwWcFjVmE6e4PPt9A

A useful article in how to properly interpret the broader Biblical witness of speaking in tongues:

https://www.samstorms.org/enjoying-god-blog/post/were-tongues-evangelistic-or-a-sign-to-unbelieving-jews#