Have sealed (spragisameno). First aorist middle participle (antecedent action, having sealed) of spragizw, old verb from spragi, a seal ( Romans 4:11 ), to stamp with a seal for security ( Matthew 27:66 ) or for confirmation ( 2 Corinthians 1:22 ) and here in a metaphorical sense. Paul was keenly sensitive that this collection should be actually conveyed to Jerusalem free from all suspicion ( 2 Corinthians 8:18-23 ). I will go on by you (apeleusomai di umwn). Future middle of apercomai, to go off or on. Note three prepositions here (ap from Rome, di by means of you or through you, ei unto Spain). He repeats the point of verse 2 Corinthians 24 , his temporary stay in Rome with Spain as the objective. How little we know what is ahead of us and how grateful we should be for our ignorance on this point.