Paul of Tarsus on Spirituality

“These things we also speak, not with words taught by human wisdom, but with those taught by [the] spirit, as we combine spiritual [matters] with spiritual [words].”

“A physical man does not receive the things of the spirit of God, for they are foolishness to him; and he cannot get to know [them], because they are examined spiritually. However, the spiritual man examines indeed all things, but he himself is not examined by any man.”