It's really simple...'IF' you believe the bible...
Who is the foundation of the church??? Jesus of course is the foundation...Jesus is God...
The church is not the Truth...Jesus/God is the truth...
Joh_14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
Therefore we Christians know without a shadow of a doubt that God is the pillar and foundation of the Truth...NOT someone's religion...
John 17:17 Sanctify them in the truth; your word is truth.