Future participants in the Kingdom will be made up of present participants in the Kingdom.  “‘Well done, my good servant!’ his master replied. ‘Because you have been trustworthy in a very small matter, take charge of ten cities’ Luke 19:17 (NIV).  Consider what is said of a faithful servant, “It will be good for that servant whose master finds him doing so when he returns.  I tell you the truth, he will put him in charge of all his possessions” Matthew 24:46-47 (NIV).  Those who live the Kingdom now will have an abundant entrance to the Kingdom then.  They not only pray, “Thy Kingdom come”, they live now advancing His government.