Be careful with your tongue and your thoughts...

Salvation is not gained when we speak idly or when we pass our days without keeping accounts. Be careful with your tongue and your thoughts, for guarding them fills the soul with the light of God. But he whose mouth is unbridled deposits various impurities in his soul.

Elder Ephraim of Arizona

http://elderephraimarizona.blogspot.gr/2015/07/be-careful-with-your-tongue-and-your.html