“Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them. For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple.” (Romans 16:17-18)

“Abide in me, and I in you. As the branch cannot bear fruit of itself, except it abide in the vine; no more can ye, except ye abide in me.” (John 15:4)

“And it came to pass, when Jesus had ended these sayings, the people were astonished at his doctrine.” (Matthew 7:28)

“And Jesus answering them began to say, Take heed lest any man deceive you.” (Mark 13:5)

“The elder unto the elect lady and her children, whom I love in the truth; and not I only, but also all they that have known the truth.” (2 John 1:1)