Though you have not seen him, you love him. Though you do not now see him, you believe in him and rejoice with joy that is inexpressible and filled with glory, obtaining the outcome of your faith, the salvation of your souls.
1 Peter 1:8-9
If we are truly filled with faith in Jesus Christ it will overflow into every aspect of our life. If others see Christ through the joy we display, other will be drawn to Christ. The unseen will be seen through us and draw others into a relationship with Him.