Here are 10 Bible verses about shallowness from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Acts 27:41 KJV
And falling into a place where two seas met, they ran the ship aground; and the forepart stuck fast, and remained unmoveable, but the hinder part was broken with the violence of the waves.
Mark 4:17 KJV
And have no root in themselves, and so endure but for a time: afterward, when affliction or persecution ariseth for the word’s sake, immediately they are offended.
Galatians 1:6 KJV
I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel:
Ephesians 4:14 KJV
That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive;
Luke 6:49 KJV
But he that heareth, and doeth not, is like a man that without a foundation built an house upon the earth; against which the stream did beat vehemently, and immediately it fell; and the ruin of that house was great.
John 6:66 KJV
From that time many of his disciples went back, and walked no more with him.
Mark 4:16 KJV
And these are they likewise which are sown on stony ground; who, when they have heard the word, immediately receive it with gladness;
Ezekiel 33:32 KJV
And, lo, thou art unto them as a very lovely song of one that hath a pleasant voice, and can play well on an instrument: for they hear thy words, but they do them not.
Ezekiel 33:31 KJV
And they come unto thee as the people cometh, and they sit before thee as my people, and they hear thy words, but they will not do them: for with their mouth they shew much love, but their heart goeth after their covetousness.
Colossians 2:8 KJV
Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ.