1. Brotherly Love

2. Introduction
The Greek word philadelphia, derived from philadelphos [loving one’s brother], signifies “the love of brothers, brotherly love” [Thomas 5360].
BDAG say it refers to “love of [a] brother/sister (elsewhere in the literature sense of love for blood brothers or sisters, in our literature in the transferred sense of affection for a fellow-Christian.”
This word occurs 6x in the NT (Rom. 12:10; 1 Thess. 4:9; Heb. 13:1; 1 Pet. 1:22; 2 Pet. 1:7 [2x]).

3. Usage in Romans 12
Brotherly love demands genuine devotion: “Be devoted to one another in brotherly love” (Rom. 12:9-13, esp. vs. 10).

4. Usage in 1 Thessalonians 4
Brotherly love should be practiced toward all, and excel still more (1 Thess. 4:9-12).

5. Usage in Hebrews 13
Brotherly love should continue (Heb. 13:1- 6).

6. Usage in 1 Peter 1
Brotherly love should be sincere, fervent and heartfelt (1 Pet. 1:22-25).

7. Usage in 1 Peter 3
Brotherly love requires a sympathetic and humble heart (1 Pet. 3:8-12).

8. Usage in 2 Peter
Brotherly love demands diligent application, and should be constantly increasing (2 Peter 1:5-11).

9. Conclusion
Obviously, our highest calling is to live according to the principles of agapē, seeking the highest good of others.
However, let us also rise to the demands of philia, manifesting the love of friendship, being tenderly- affectionate to one another.