"You may be cheerful if you will bring even your thoughts into subjection to the will of Christ. You should make no delay, but closely search your own heart and die to self daily. You may inquire: How can I master my own actions and control my inward emotions? Many who profess not the love of God do control their spirit to a considerable extent without the aid of the special grace of God. They cultivate self-control. This is indeed a rebuke to those who know that from God they may obtain strength and grace, and yet do not exhibit the graces of the Spirit. Christ is our model. He was meek and lowly. Learn of Him, and imitate His example. The Son of God was faultless. We must aim at this perfection and overcome as He overcame, if we would have a seat at His right hand. 3T 336.1"
"But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, Meekness, temperance: against such there is no law."
Both passages discuss the importance of self-control and cultivating virtues. Galatians 5:22-23 lists the fruits of the Spirit, including meekness and temperance, while the EGW passage emphasizes bringing thoughts into subjection to Christ and cultivating self-control, mirroring the idea of developing spiritual graces.
"Knowledge of useful labor will impart to your restless and dissatisfied mind energy, efficiency, and a becoming, modest dignity, which will command respect. You know but very little of yourself; you know not the deceptions of your own heart. The heart is deceitful above all things and desperately wicked. Search your heart carefully, and take time for meditation and prayer. Unless you see the defects in your character and with genuine sincerity correct your errors, you cannot be a disciple of Christ. 3T 336.3"
"The heart is deceitful above all things, and desperately wicked: who can know it?"
EGW directly quotes Jeremiah 17:9. The context also aligns with the biblical verse's warning about the deceitfulness of the human heart.