faith is hard

"Our opponents regard faith as an easy thing, but I know from personal experience how hard it is to believe. That the Holy Ghost is received by faith, is quickly said, but not so quickly done.

All believers experience this difficulty. They would gladly embrace the Word with a full faith, but the flesh deters them. You see, our reason always thinks it is too easy and cheap to have righteousness, the Holy Spirit, and life everlasting by the mere hearing of the Gospel" - Martin Luther