So keep at your work, this faith and love rooted in Christ, exactly as I set it out for you. It’s as sound as the day you first heard it from me. Guard this precious thing placed in your custody by the Holy Spirit who works in us. (2 Timothy 1:13-14)
As sound as...did you catch that? Faith may seem like a thing that constantly isn't 'enough' for the circumstances we are in, but in truth it is our trust that isn't 'enough' in those moments. We are not without faith - we are without trust. Is there a difference? Faith is the belief we hold - trust is the action we take based upon our faith. God reminds us our faith is 'as sound as' it was when we first said 'yes' to him. In fact, it is probably stronger! It is more likely our 'actions' are not all that 'faith-like'.
Faith has to be guarded - not because it can be stolen from us, but because we will find that there will always be things that influence our emotions, making us 'think' our faith is waning. It isn't our faith - it is the actions we take that reveal where we are placing our faith in that moment. Faith is the belief we hold in what is unseen and sometimes unknown. The actions that come as a result of what we believe in at this moment are what reveal what we are really trusting in. It is that trust in something or someone that moves us into action. Without trust, we would never act.
We think someone like the enemy of our souls can steal our faith, but our faith is based in someone who does not change, who is always there, and whose love would go to the uttermost depths and breadths to stand by us. What the enemy can do is get us distracted by things that make us focus our attention elsewhere - so we are more likely to take actions that show we aren't fully trusting God at that moment. We will try to fix the problem presented all in our own efforts because we begin to doubt God will actually come alongside to help us with the problem. In turn, we begin to 'feel' like our faith is diminished. It isn't our faith - it is our trust. Focus on the right 'enemy' you are battling and you are likely to overcome that enemy! Just sayin!