King James Version
Which is a manifest token of the righteous judgment of God, that ye may be counted worthy of the kingdom of God, for which ye also suffer:English Standard Version
This is evidence of the righteous judgment of God, that you may be considered worthy of the kingdom of God, for which you are also suffering--New International Version
All this is evidence that God's judgment is right, and as a result you will be counted worthy of the kingdom of God, for which you are suffering.