Definition and Context:
In the Bible, marriage is a covenantal union established by God between a man and a woman. It is designed for companionship, procreation, and mutual support. The institution of marriage is foundational to human society and is often used as a metaphor for the relationship between God and His people.

Biblical Foundations:
The concept of marriage is introduced in the early chapters of Genesis. Genesis 2:24 states, "For this reason a man will leave his father and mother and be united to his wife, and they will become one flesh." This verse highlights the leaving, cleaving, and uniting aspects of marriage, emphasizing its exclusivity and permanence.

Roles and Responsibilities:
The Bible outlines specific roles and responsibilities for husbands and wives. Ephesians 5:22-33 provides a detailed description of these roles, where wives are instructed to submit to their husbands as to the Lord, and husbands are called to love their wives as Christ loved the church. This passage underscores the sacrificial nature of love and the importance of mutual respect and submission within the marital relationship.

Marriage as a Covenant:
Malachi 2:14 refers to marriage as a covenant, stating, "The LORD is a witness between you and the wife of your youth. You have broken faith with her, though she is your partner, the wife of your marriage covenant." This covenantal aspect signifies a solemn and binding agreement, witnessed by God, that should not be broken lightly.

Marriage and Purity:
The Bible places a strong emphasis on sexual purity within marriage. Hebrews 13:4 declares, "Marriage should be honored by all and the marriage bed kept undefiled, for God will judge the sexually immoral and adulterers." This verse highlights the sanctity of the marital relationship and the importance of fidelity.

Challenges and Support:
While marriage is a source of joy and fulfillment, it also presents challenges. 1 Corinthians 7:28 acknowledges, "But those who marry will face troubles in this life, and I want to spare you this." The Bible encourages married couples to rely on God's guidance and strength to navigate these challenges.

Divorce and Remarriage:
The Bible addresses the issue of divorce, emphasizing that it is not part of God's original design for marriage. Matthew 19:6 states, "So they are no longer two, but one flesh. Therefore what God has joined together, let man not separate." However, allowances for divorce are mentioned in cases of marital unfaithfulness (Matthew 19:9).

Marriage as a Reflection of Christ and the Church:
The relationship between Christ and the Church is often depicted as a marriage, with Christ as the bridegroom and the Church as His bride. Revelation 19:7 proclaims, "Let us rejoice and be glad and give Him the glory! For the marriage of the Lamb has come, and His bride has made herself ready." This imagery underscores the deep, sacrificial love Christ has for His people and the purity and devotion expected of the Church.

Practical Guidance for the Married:
The Bible offers practical advice for maintaining a healthy marriage. Colossians 3:18-19 advises, "Wives, submit to your husbands, as is fitting in the Lord. Husbands, love your wives and do not be harsh with them." Communication, forgiveness, and prayer are essential components of a thriving marital relationship.

Conclusion:
The Bible presents marriage as a divine institution with profound spiritual significance. It is a covenantal relationship that requires commitment, love, and mutual respect, reflecting the love of Christ for His Church.