Jesus said this about the sermon on the mount
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. The 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.
Matt 7:24-25
Now here is a quote from a contributor.
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The sermon on the mount was to show the Jews how futile the law was, how only through what Jesus was about to do through His grace and Mercy on the cross to usher in the New Covenant.
Not as basic instruction for how to be a Christian
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So this is actually saying ignore what Jesus is saying, He is saying it all
just to make you feel bad so you will believe in the cross to do everything
for you and your behaviour is irrelevant.
So Jesus is lying about all the issues, and does not expect our righteousness
to be true love coming from the heart, or our prayers to be in secret, or
our love for women to not be adulterous, or our anger not to be constained,
or our giving not to be in secret, or our loving of our enemies not be be like
Gods loving.
This is both rebellion against Jesus's obvious intention repeated by the apostles
and replacing the Law of Christ with lawlessness.
Anyone who teaches like this is disowning Christ and His eternal words and
therefore Jesus will disown before the Father.
But whoever disowns me before others, I will disown before my Father in heaven.
Matt 10:33
As Jesus says in the seed and the sower, if His word does not abide in you and
produce crop of more words, then you are not part of Him.