Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof. – Proverbs 18:21
Praying in tongues assists you in bringing your natural tongue under control.
Control your tongue and you will control your life. Peter tells us, For he that will love life, and see good days, let him refrain his tongue from evil, and his lips that they speak no guile: (1 Peter 3:10)
The words that you speak into the atmosphere play a major role in what goes on in your life. Death…or life…you have the ability, with your words, to speak that out. I would hope that you would always choose to speak life.
Apostle's Daily Meditations 
Apostle I Totally Embrace That Praying In My Supernatural Language Assist Me In Bringing My Natural Tongue Under Control. Moreover, I Acknowledge That What My Natural Tongue Speaks Plays A Pivotal Role In What Goes On In My Life. I Purpose To Speak Life With My Tongue – Not Death.