For we have been made participants in Christ. This is only so, if we firmly retain the beginning of his substance, even unto the end
Other versions
King James Version
For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end;English Standard Version
For we share in Christ, if indeed we hold our original confidence firm to the end.New International Version
We have come to share in Christ if we hold firmly till the end the confidence we had at first.