God deliberately chooses the weak and foolish things of the world to do His work to confound the wise, so that no mortal can ever have reason to glory or to boast in his own flesh (1 Cor. 1:27-29).
God is not as concerned with your weaknesses as you are.
“…We are not able to go up against the people [of Canaan], for they are stronger than we are” (Num. 13:31).
The problem with the spies in Numbers 13 is they looked at the giants instead of looking at God. Yes, there were giants in the land, but the Israelites needed to look at God and not the giants.
There are some giants in my life. But I don’t need to stare at those giants. I need to stare at God. I need to deep my gaze firmly fixed on God and believe that He can do what He says He can.
The same is true for you. Your spirit wants to produce tremendous things in your life. But if you always keep that spirit man pushed down by negative attitudes, thoughts and words, he will never rise up to bring you into the place God wants you to occupy, into the land He wants you to possess.