Hebrews 11:1 ESV 'Now faith is the assurance of things hoped for, the conviction of things not seen.' 2 Corinthians 5:7 ESV 'For we walk by faith, not by sight.'
As Christians, we are constantly holding onto to the hope that Jesus gives us. When we need to trust Him through different challenges we face, we need faith. I personally feel as though my faith in God grows each day as I trust Him through the battles I face. So, I encourage you to allow your faith to grow from within your relationship with Him.
