Holiness is a central theme in the Bible, reflecting the nature and character of God and His expectations for His people. The term "holiness" signifies being set apart, pure, and dedicated to God. In the Old Testament, the Hebrew word for holiness is "qodesh," while in the New Testament, the Greek word is "hagios." Both convey the idea of separation from sin and dedication to divine purposes.

God's Holiness: The holiness of God is foundational to His identity. In Isaiah 6:3, the seraphim proclaim, "Holy, holy, holy is the LORD of Hosts; His glory fills the whole earth." This thrice-repeated declaration emphasizes the absolute purity and moral perfection of God. God's holiness is also evident in His actions and judgments, as seen in Leviticus 11:44, where He commands, "For I am the LORD your God. Consecrate yourselves therefore, and be holy, because I am holy."

Holiness of Believers: Believers are called to reflect God's holiness in their lives. In 1 Peter 1:15-16, it is written, "But just as He who called you is holy, so be holy in all you do, for it is written: 'Be holy, because I am holy.'" This call to holiness involves a transformation of character and conduct, aligning one's life with God's will and rejecting sin.

Sanctification: The process of becoming holy is known as sanctification. It is both a positional and progressive work of God in the life of a believer. Hebrews 10:10 states, "And by that will, we have been sanctified through the sacrifice of the body of Jesus Christ once for all." This indicates that believers are set apart through Christ's sacrifice. However, sanctification is also an ongoing process, as seen in 1 Thessalonians 4:3, "For it is God’s will that you should be sanctified: You should avoid sexual immorality."

Holiness in Worship: Holiness is integral to worship, as God desires worship that is pure and sincere. In John 4:24, Jesus teaches, "God is Spirit, and His worshipers must worship in spirit and in truth." Worship that is holy is characterized by reverence, obedience, and a heart fully devoted to God.

Security

Security in the biblical context refers to the assurance and confidence believers have in their relationship with God, their salvation, and His providential care. This security is rooted in the character of God, His promises, and the work of Jesus Christ.

Security of Salvation: The security of a believer's salvation is a key tenet of the Christian faith. In John 10:28-29, Jesus assures, "I give them eternal life, and they will never perish. No one can snatch them out of My hand. My Father who has given them to Me is greater than all. No one can snatch them out of My Father’s hand." This passage underscores the eternal security of those who belong to Christ, emphasizing the power and faithfulness of God to preserve His people.

God's Faithfulness: The security of believers is grounded in God's unchanging nature and His faithfulness to His promises. In Lamentations 3:22-23, it is declared, "Because of the LORD’s loving devotion we are not consumed, for His mercies never fail. They are new every morning; great is Your faithfulness!" This assurance provides believers with confidence in God's continual care and provision.

Protection and Provision: The Bible frequently speaks of God's protection and provision for His people. Psalm 91:1-2 states, "He who dwells in the shelter of the Most High will abide in the shadow of the Almighty. I will say of the LORD, 'He is my refuge and my fortress, my God, in whom I trust.'" This imagery of God as a refuge and fortress conveys the security found in His presence.

Peace and Assurance: The security offered by God brings peace and assurance to the believer's heart. Philippians 4:6-7 encourages, "Be anxious for nothing, but in everything, by prayer and petition, with thanksgiving, present your requests to God. And the peace of God, which surpasses all understanding, will guard your hearts and your minds in Christ Jesus." This peace is a result of trusting in God's sovereignty and care.

In summary, holiness and security are intertwined in the life of a believer, reflecting a life set apart for God and the assurance found in His faithful promises.