The heart that loves this world is a heart left unguarded from the ways of this world (1 John 2:15-17). The unguarded heart is subject to a life without peace, a life where circumstances, people, things, and worry can steal away our joy (Philippians 1-4).
In Christ, we have a relationship with God that frees us from a heart that loves of this world. In Christ we have encouragement from being united with Him, comfort from His love, fellowship with His Spirit, and tenderness and compassion from the new heart created in us by the power of the gospel.
Satan wants us to treasure this world without tenderness and compassion toward one another. However, in Christ Jesus, God has given us victory over this world and all its desires. We, too, like the saints of old can overcome Satan by the blood of the Lamb, and the word of the testimony about Jesus Christ.
The blood that cleanses us is the blood that changes us. It changes us from being people filled with the selfish ambition and vain conceit that enslave those only considering themselves. Philippians 2:1-4.
2 Corinthians 5:17 – Therefore, if anyone is in Christ, he is a new creation; the old has gone, the new has come!
Ezekiel 36:26 – I will give you a new heart and put a new spirit in you; I will remove from you your heart of stone and give you a heart of flesh.
1 If you have any encouragement from being united with Christ, if any comfort from his love, if any fellowship with the Spirit, if any tenderness and compassion, 2 then make my joy complete by being like-minded, having the same love, being one in spirit and purpose. 3 Do nothing out of selfish ambition or vain conceit, but in humility consider others better than yourselves. 4 Each of you should look not only to your own interests, but also to the interests of others.
5 Your attitude should be the same as that of Christ Jesus: . . .
4 Rejoice in the Lord always. I will say it again: Rejoice! 5 Let your gentleness be evident to all. The Lord is near. 6 Do not be anxious about anything, but in everything, by prayer and petition, with thanksgiving, present your requests to God. 7 And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus. (Philippians 2:1-5a; 4:4-6 NIV)