1 Peter 1:13

So prepare your minds for action, be completely sober (in spirit steadfast, self-disciplined, spiritually and morally alert), fix your hope completely on the grace (of God) that is coming to you when Jesus Christ is revealed.  

The strength of our faith depends on our diligence in preparation and study. We will have trouble if we don’t prepare ourselves in the spirit and be self-disciplined according to God’s word. Our hope in Jesus and His coming again should motivate us to remain steadfast in the faith.