SINGLE SCRIPTURE PROOF TEXTINGS OFTEN GIVE INCONSISTENT UNDERSTANDING
A Tree and Its Fruit
15"Watch out for false prophets. They come to you in sheep's clothing, but inwardly they are ferocious wolves. 16By their fruit you will recognize them. Do people pick grapes from thornbushes, or figs from thistles? 17Likewise every good tree bears good fruit, but a bad tree bears bad fruit. 18A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit. 19Every tree that does not bear good fruit is cut down and thrown into the fire. 20Thus, by their fruit you will recognize them.
21"Not everyone who says to me, 'Lord, Lord,' will enter the kingdom of heaven, but only he who does the will of my Father who is in heaven. 22Many will say to me on that day, 'Lord, Lord, did we not prophesy in your name, and in your name drive out demons and perform many miracles?' 23Then I will tell them plainly, 'I never knew you. Away from me, you evildoers!'
If you get away from JW style, single scripture exegesis then you probably already see the contextual difference between the two verses in question. Jesus is speaking of false prophets who have called upon the Lord NOT for salvation but for self gain.
The Wise and Foolish Builders
24"Therefore everyone who hears these words of mine and puts them into practice is like a wise man who built his house on the rock. 25The rain came down, the streams rose, and the winds blew and beat against that house; yet it did not fall, because it had its foundation on the rock. 26But everyone who hears these words of mine and does not put them into practice is like a foolish man who built his house on sand. 27The rain came down, the streams rose, and the winds blew and beat against that house, and it fell with a great crash."
28When Jesus had finished saying these things, the crowds were amazed at his teaching, 29because he taught as one who had authority, and not as their teachers of the law.
In the above, Jesus is explaining the Sermon on the Mount to His audience. Below, Paul is explaining how one gets ‘saved’!
5Moses describes in this way the righteousness that is by the law: "The man who does these things will live by them."[a] 6But the righteousness that is by faith says: "Do not say in your heart, 'Who will ascend into heaven?'[b]" (that is, to bring Christ down) 7"or 'Who will descend into the deep?'[c]" (that is, to bring Christ up from the dead). 8But what does it say? "The word is near you; it is in your mouth and in your heart,"[d] that is, the word of faith we are proclaiming: 9That if you confess with your mouth, "Jesus is Lord," and believe in your heart that God raised him from the dead, you will be saved. 10For it is with your heart that you believe and are justified, and it is with your mouth that you confess and are saved. 11As the Scripture says, "Anyone who trusts in him will never be put to shame."[e] 12For there is no difference between Jew and Gentile—the same Lord is Lord of all and richly blesses all who call on him, 13for, "Everyone who calls on the name of the Lord will be saved."[f]