Faith or no faith?

I was struck by God's Words to Isaiah in Isaiah chapter 7: If you are not firm in faith, you will not be firm at all."   Faith requires taking a stance, trusting in God and His Word and Promises.  If you are not firm in the faith, you faith will be tossed around like the wind.  But if you have faith, you stand on the Lord's promises.   On Christ the solid Rock I stand.  All other ground is sinking sand.