When my wife meets Christ in me and I meet Christ in her, our marriage is a wonderful thing. But when its only me that my wife encounters, well, foolishness, selfishness and sin are likely to follow. I pray daily that I would be a "vessel sanctified and meet for the Master's use," a man in whom Christ is clearly manifested, and when I am, my marriage is one of peace, joy and love. (Romans 8:29; 2 Corinthians 4:7-11; Galatians 5:22-23)
I'm not sure what "unconditional love" means. God's love is not "unconditional"; He hates sin and will judge and punish all sinners who die unrepentant in their sin (Romans 2:4-11; John 3:36). He lays down the condition of trust in Christ as a necessary predicate for relationship with Himself (John 3:16; John 14:6; Romans 10:9-10; Acts 4:12). He commands that we love Him with all of our being (Matthew 22:36-38; 1 Corinthians 13:1-3). He requires that we be holy (Hebrews 12:14; Matthew 5:48; 1 Peter 3:10-12).