Psalm 27

¹ The Lord is my light and my salvation—
    whom shall I fear?
The Lord is the stronghold of my life—
    of whom shall I be afraid?

² When the wicked advance against me
    to devour^[a] me,
it is my enemies and my foes
    who will stumble and fall.
³ Though an army besiege me,
    my heart will not fear;
though war break out against me,
    even then I will be confident.

These verses are about faith! The Lord is my light and my salvation. Light is something that makes things visible and salvation is deliverance from harm. God is a provider of light and salvation, illuminates our lives from darkness and rescues us from sin. He is the reason we live on, free from the enemy. 

When one is in tough circumstances, do you fear?  Where and who is your confidence and hope based on? Yourself? Or God? When an army besiege you, then you will find out. We put our faith and confidence in a lot of things(gods), technology is one, but what does it mean for us to trust in the Lord? It is not blind faith but because of what He had done in the past, we can be sure that He will do in the future. Whether it is in our own lives or in others or in the bible, it is shown that He had done it before. Based on His track record, that is also where faith comes in, faith that He will do it again. Faith that He exists. We cannot prove God in a scientific and logical manner that God exist, but we know that we can do that only by faith. In your hard times, your god will be revealed, whether it is the Lord, yourself or someone or something. It would be revealed!