'' And Joseph dreamed a dream and he told it his brethren: and they hated him the more, And he dreamed yet another dream and told it his brethren, and said. Behold, the sun and the moon and the eleven stars made obeisance to me'' (Genesis 37:9)

Joseph kept telling his brothers his dreams though he knew they hated him for it. Their hatred and scornful words didn't stop him from speaking his dreams, ansd certainly couldn't stop the dreams from coming to pass. God can give you a dream of a great future. Therefore, it's expedient that you declare the dream with your mouth, and see beyond every human limitation.

Don't mouth your dreams. Don't talk your dreams. Live them. Live your dreams. It is much more rewarding.

Let me tell you something very important: some people will dislike you for talking your dreams.
The world doesn't like to hear you talk about your dreams of success and greatness.
They'll make fun of your dreams of greatness because they can't understand that those dreams you talk about aren't of men, but of God.
So they jeer as they watch to see what will become of the dreams you've been talking about.
Nobody may enjoy hearing your dreams but don't stop talking about them. As you keep talking about what God is doing in your life, you can only get greater.
Its important that youkeep your focus on the dreams or visions God gives you. As long as they are of God, they will come to pass.
Those who laugh at you will watch you grow and increase until your dreams come to pass.

one other reason why you have to keep talking your dream, is that the bible says in the book
(james 3:4-5) " Behold, we put bits in the horses' mouths, that they may obey us; and we turn about their whole body. Bohold also the ships, which though they be so great, and are driven of fierce winds, yet are they turned about with a very small helm, whithersoever the governor listeth. Even so the tongue is a little member; and boasteth great things. Behold, how great a matter a little fire kindleth!"
The life you have today is a result of your tongue-work; everything you've been saying. Your words direct the course of your destiny, positively or otherwise; never forget that.
The Bible says (james 3:2). "For in many things we offend all. If any man offend not in words, the same is a perfect man, and able also to bridle the whole body"
In( Proverbs 18:21) it says " Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof"

Another reason why you need to keep talking your dreams
( Joshua 1:
"This book of the law shall not depart out of thy mouth; but thou shalt meditate therin day and night, that thou mayest observe to do according to all that is writen therein: for then thou shalt make thy way prosperous, and then shalt have good success.