"If we do represent Christ, we shall make His service appear attractive, as it really is. Christians who gather up gloom and sadness to their souls, and murmur and complain, are giving to others a false representation of God and the Christian life. They give the impression that God is not pleased to have His children happy, and in this they bear false witness against our heavenly Father. SC 116.1"
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven."
The EGW passage directly echoes the sentiment of Matthew 5:16, emphasizing the importance of representing Christ in a way that glorifies God. The idea of letting your light shine through good works is directly related to making Christ's service appear attractive.
Satan is exultant when he can lead the children of God into unbelief and despondency. He delights to see us mistrusting God, doubting His willingness and power to save us. He loves to have us feel that the Lord will do us harm by His providences. It is the work of Satan to represent the Lord as lacking in compassion and pity. He misstates the truth in regard to Him. He fills the imagination with false ideas concerning God; and instead of dwelling upon the truth in regard to our heavenly Father, we too often fix our minds upon the misrepresentations of Satan and dishonor God by distrusting Him and murmuring against Him. Satan ever seeks to make the religious life one of gloom. He desires it to appear toilsome and difficult; and when the Christian presents in his own life this view of religion, he is, through his unbelief, seconding the falsehood of Satan. SC 116.2 Many, walking along the path of life, dwell upon their mistakes and failures and disappointments, and their hearts are fille…
"Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it."
Both passages describe Satan's character as a liar and deceiver, who misrepresents truth. EGW expands on this by detailing how Satan specifically misrepresents God's character and intentions.
"Now the serpent was more subtil than any beast of the field which the Lord God had made. And he said unto the woman, Yea, hath God said, Ye shall not eat of every tree of the garden?"
Both passages describe Satan's initial deception, where he casts doubt on God's word and intentions. EGW's passage elaborates on the ongoing nature of this tactic.
"And no marvel; for Satan himself is transformed into an angel of light."
Both passages address Satan's deceptive nature. While 2 Corinthians 11:14 speaks of Satan's disguise, EGW's passage speaks of his misrepresentation of God. There is a thematic connection in that both involve deception.