“For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he saith shall come to pass; he shall have whatsoever he saith.” Mark 11:23

In working your faith, what you say is very important. Do not expect to believe for one thing and say something else. Your confession must match what you believe- that is faith!
“We having the same spirit of faith, according as it is written, I believed, and therefore have I spoken; we also believe, and therefore speak;” 2 Corinthians 4:13
When you have spoken, remember what you have said and do not upgrade or downgrade your confession; neither should you doubt, changing your confession conotes instability and there is no promise for the unstable or double minded man:
“For let not that man think that he shall receive any thing of the Lord. A double minded man is unstable in all his ways.” James 1:7-8
Remember what you said and “believe that THOSE THINGS WHICH HE SAITH shall come to pass.” Your believing must match your speaking; you don’t say something and believe something else would come to pass; it is what you say that you must anticipate and Jesus said “…he shall have whatsoever he saith.” It is what you say you would have; and it is what you say, you must believe in your fight of faith. If you desire something; say exactly what you desire so when the time comes to fight the good fight of faith, there would be no room for double mindedness.