Paul’s language in Philippians 3:10 is translated in the ESV as “share his sufferings.” The Greek is κοινωνίαν τῶν παθημάτων. “Koinonia” here is the community and association. This newly formed community is tattooed with suffering. They share in the messianic pain. They are built up through the sufferings of one another. In mourning with those who mourn they are forming an authentic koinonia in truth and are being co-shaped after the image of Jesus, the Messiah.
{Textual annotations from sermon on Philippians 3:10-11}