Contradiction with Hebrews 6:4-6
These verses suggest that it's possible for believers who have shared in the Holy Spirit to fall away, which might challenge the notion of a secure relationship that cannot grieve the Spirit.
Hebrews 6:4-6: For [it is] impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
Contradiction with 1 Thessalonians 5:19
Advises not to quench the Spirit, implying that believers have the capacity to suppress or hinder the Spirit's work, which could be contrasted with the idea of not grieving the Spirit.
1 Thessalonians 5:19: Quench not the Spirit.
Contradiction with 1 Samuel 16:14
Describes the Spirit of the Lord departing from Saul, countering the idea of the Holy Spirit's secure residence with believers.
1 Samuel 16:14: But the Spirit of the LORD departed from Saul, and an evil spirit from the LORD troubled him. [troubled: or, terrified]
Contradiction with Psalms 51:11
David pleads not to have the Holy Spirit taken from him, suggesting the Spirit's potential departure is a concern, contrary to the permanence implied in Ephesians.
Psalms 51:11: Cast me not away from thy presence; and take not thy holy spirit from me.
Contradiction with Galatians 5:4
Speaks of falling from grace and being severed from Christ, implying a vulnerability in the relationship with God that contrasts with Ephesians' implied stability.
Galatians 5:4: Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace.