The realm of your consciousness determines and influence your speech. If you're lock up in the realm of impossibility and human consciousness, your speech must align.
If for example you're lock up into the consciousness of possibility that exists in the heavenly, your speech will begin to align as well. It's an unbroken law sustain and enforce by the integrity of God Himself.
You can't claimed to be connected to consciousness of heaven and speak like those of the earth. Every consciousness determines its inhabitants speech and outlook embedded in it operations. That's the same reason why God speaks the way He does, it's not necessary because He want to sound difficult to comprehend.
The limitations of your earthly perspective cannot comprehend the possibilities of the spiritual. This is one of the reasons Jesus send us the HolySpirit to help bridge the gap and help us understand what God is communicating to us. When God speaks, He does according to the awareness of possibility available to Him.
This is also a law that guide the truth that light shines in darkness and darkness cannot comprehend it. Going by the same logic, it means the consciousness that power of darkness cannot handle the superior consciousness of the light.
This is what it means to walk in the light. When you're walking in the consciousness that light provides, your speech and outlook about life changes. Not because you wanted to but walking in the realms and consciousness of light compel your speech to change.
This changes may take time but keep walking in the light and in no time you will find out the realities of the consciousness of light begin to manifest in your life, affect your speech and outlook and mind as well.
That is why Apostle Paul prayed that your eyes of understanding be flooded with light. When the possibility that's produce out of the consciousness of light flood your mind, you'll begin to experience the reality of that consciousness.
And the reason our speech will change is because our eyes, ears and nose have been activated to interact with the realities available in that consciousness. This is why what you feed your eyes, ears and mind is crucial. The mouth does not speak in vacuum. There is a feedback from a realm of consciousness that inform what the mouth speak. What you're saying about that situation is a coagulation of the information available that you have feed yourself with.
I can't encourage you to start speaking right emphasizing feeding the right data into your mind through your senses.