Forgetting: Generally, forgetfulness is something to be ashamed of. Scripture likens anyone who hears the word without responding by faith as one who has forgotten what he has heard, proving that he is deluded (Jas. 1:22-24). But Paul turns this definition on its head (Phil. 3:13). We ought to forget^{^[1]} what is in our past in order to remain singularly focused^{^[2]} on Christ Jesus our Lord. This requires a separation from sin; the Bible uses phrases such as lay aside (Eph. 4:22, Heb. 12:2) and put aside (Col. 3:8, Jas. 1:21, 1 Pet. 2:1). Moreover, we put no confidence in past deeds of faith. They must not be the objects of our confidence and hope because they were manifestations of God's grace in us (1 Cor. 15:10) and we only did that which we should have done (Lk. 17:10).

Reaching: We are exhorted to continuously strain forward to the fullness of salvation which Christ has secured for us (Rom. 4:25; 1 Cor. 15:20; 2 Cor. 5:15). As a runner leans into the finish line, so Christians reach toward Christ by faith in Him (Phil. 3:12, 14). We take on the mind of Christ (Phil. 2:5) and follow His example (1 Pet. 2:21). With great confidence in His enablement (Phil. 3:12; 1 Pet. 5:10; 2 Pet. 1:4), we grow in diligence to will and work for God's good pleasure (Phil. 2:13; 3:14; Ps. 119:24). Our present lives should have similarities with our everlasting life, in full union with Christ (Rom. 6:5).

[1] This is a very nuanced term, and care should be taken so as not to misconstrue its meaning. It means, do not place your confidence in past victories which the Lord led you through, nor let past defeats weigh you down from serving the Lord to your fullest extent in the present. Additionally, it is acceptable and proper to thank the Lord for past blessings which He has granted to you.

[2] This is not to say that we neglect the clear Christian duties given to us in Scripture. Rather, everything that we think, say, and do is filtered through our focus on Christ.