When we use common English in place of church words some concepts are easier to comprehend.

• Saved by Grace turns out to be saved by the kindness of God. 
• Saved by Faith is saved by the assurance of things hoped for, the conviction of things not seen. 
• Preach the Gospel is preach the Good News. 
• Baptism of the Holy Spirit is immersed by or in the Holy Spirit. 
• Confessing Jesus before man is acknowledging Jesus before man.  

Maybe we do not understand the Bible because we prefer to speak a different language than that of the Bible.