Just because we cannot see something, doesn¹t mean that it is not there.  Kind of like the wind, just because we can¹t see the wind, but only see the effects of the wind doesn¹t mean that it is not real.  The same applies for JESUS we may not be able to see Him but that doesn¹t mean that He does not exist.  It is by Faith that we believe in Him.

"By Faith we understand that the universe was formed at GOD¹S command, so that what is seen was not made out of what was visible."
Hebrews 11:3

Paul uses the creation of the universe as an illustration, that GOD can be where man cannot see Him.  We need to be able to take a step of Faith to believe in our heart that He is real.  Because without believing we are totally lost.

"And without Faith it is impossible to please GOD, because anyone who comes to Him must believe that He exists and that He rewards those who earnestly seek Him."  Hebrews 11:6

If we do not have the Faith to believe in the FATHER, we can never truly find the peace that we are looking for.  We will forever be lost wondering around, looking to find something that is right in front of us the whole time.  GOD wants us to find Him, He wants us to be able to look to Him in Faith to fulfill our needs.