The gospels typically solve this dilemma by proclaiming cross and resurrection together. The resurrected Christ is not trapped in time, man of the First Century but not our own. He is raised. Paul preaches this in places like Romans. He doesn't mention resurrection.
Resurrection is replaced by a word.
The word of the cross makes Christ present. But not just any old word. It is word about the cross. It pains me to say this, thinking of the lousy sermons I've heard and more that I've preached. But perhaps that's one reason why you are here, you have met the risen Christ in something so vulnerable, so foolish as preaching.