 When you are steadfast in the word, having firmly planted the word of God in your heart, you are like a tent peg that secures the tent. Jesus' teaching will secure in your heart the word of God. Matthew 7, 24 says that to everyone who hears my words and acts upon them will be compared to a wise man who built his home on a rock. If you believe God raised Jesus from the dead, then you must believe that he died on the cross.