Here in Psalm 27 I would encourage you to read it perhaps in a more concrete manner. Instead of merely reading it as a pretty Psalm, a type of poetry or a beautiful song...read it as an actual invitation to you to believe God.
I would encourage you to read it as though living in the Kingdom of God is actually more real than what you see and feel around you...because it is.
That is ~ it is as real as you determine it to be. It is obviously real despite you or I...but, what matters more, is how we each determine it to be. The words in scripture, the things Jesus taught, and what we say we believe will actually only manifest themselves as real based on the vitality of our faith...not the 'bigness' of our faith, but how real it is ~ then our actions will naturally respond accordingly.
Matthew 9:29 Then He touched their eyes and said,
"Let it be for you according to your faith."