As a Christian, Paul now considered these things (3:5–6) worthless because of what Christ has done. A believer’s relationship with God is defined by knowing Christ and nothing else (compare 3:10; John 17:3). The only important thing is to gain Christ, thus receiving the gift of eternal salvation (see John 3:16; 1 John 5:11–13). In comparison, all other things are meaningless garbage (or rubbish).