“Therefore, as ye abound in every thing, in faith, and utterance, and knowledge, and in all diligence, and in your love to us, see that ye abound in this grace also.”  2 Corinthians 8:7

He says abound in faith; and it is for your own good. When you abound in faith, you can frame anything and bring something out of nothing:
“Through faith we understand that the worlds were framed by the word of God, so that things which are seen were not made of things which do appear.”  Hebrews 11:3
you can remove anything:
“…I have all faith, so that I could remove mountains…”  1 Corinthians 13:2
you turn something into nothing:
“And God chose… what is nothing, in order to destroy what is something,”  1 Corinthians 1:28, ISV
If your faith is abounding, then you would be abounding in talking:
“We having the same spirit of faith… and therefore speak;”  2 Corinthians 4:13
Your faith can be traced to your communication; the more you use your faith, the more you would speak, and as you remain standing in your position of faith, your dogged speech would be manifest and would abound!
So he says, abound in utterance! Utterance is from the word ‘logos’ which means the ‘word of God’ abound in speaking the word of God- even this morning, speak the word of God- to yourself!
Do you know when you do so, you are ensuring that you would be filled with the Spirit?
“And be not drunk with wine, wherein is excess; but be filled with the Spirit; Speaking to yourselves…” Ephesians 5:18-19
You are unstoppable- that’s a fact, now say this and many more from the word of God to yourself!