Faith and fear cannot coexist. One gives way to the other. The simple fact is we all need to constantly build faith and overcome sources of destructive disbelief. The Savior’s teaching comparing faith to a grain of mustard seed recognizes this reality (see Matthew 13:31–32). Consider it this way: our net usable faith is what we have left to exercise after we subtract our sources of doubt and disbelief. You might ask yourself this question: “Is my own net faith positive or negative?” If your faith exceeds your doubt and disbelief, the answer is likely positive. If you allow doubt and disbelief to control you, the answer might be negative.