Loss: Most of us have achieved some kinds of secular achievements. It may be from the past, or a present reality in life.[1] On top of that, there are many other things that we love and cherish, such as family or something we want but don't have. However, Christians consider all of it as rubbish when compared to the surpassing value of knowing Christ (Phil. 3:8). In the end, we cannot take any material things into eternity (Mt. 24:35; 2 Pet. 3:10). So, why would we live for them now? Neither can we take any earthly honors into God's kingdom because He will not share His glory with anyone (Isa. 42:8, 48:11). Moreover, our families are a gift from the LORD for His glory (Ps. 127:3; Pr. 18:22). Therefore, we do not coddle their worldly desires but encourage them to glorify the Lord through greater conformity to Him.[2]
Gain: The resurrection is the culmination of knowing Christ and it is the prize for every Christian (Phil. 3:14). It is when we will see our Savior face to face (1 Cor. 13:12; 1 John 3:2) with our glorified bodies and immortality (1 Cor. 15:54; 2 Cor. 5:4; 1 Pet. 1:4). This is to be preferred over our fleeting earthly lives (Phil. 1:23; 2 Cor. 4:16; 5:8). More than that, our unwavering hope is founded upon Christ who is the first of the resurrection (1 Cor. 15:20; Col. 1:18). Consequently, we strive to maintain our unity with Him and sanctify ourselves for the resurrection (2 Cor. 7:1; 1 Pet. 3:21; 1 John 3:3).
[1] See Paul's achievements in Phil. 3:5b-6 indicated by the phrase, "as to." Modern examples may include athletic awards, educational degrees, a coveted career, the American dream, financial stability.