f Cornelius would have died the day before Peter came to him, what would have been his eternal destiny?

This question seems to be based on a religious or spiritual perspective, specifically within the context of Christianity. However, it's important to note that interpretations can vary greatly depending on one's personal beliefs, religious denomination, and interpretation of religious texts.

In the New Testament of the Bible, Cornelius is a centurion who is directed by an angel to seek Peter. Peter shares the Gospel with Cornelius, and he and his household are baptized.

If Cornelius had died before Peter came to him, his eternal destiny would depend on various interpretations of Christian doctrine. Some Christians believe that salvation comes through faith in Jesus Christ alone, and since Cornelius had not heard the Gospel before Peter's arrival, he would not have had the opportunity to accept Jesus as his savior.

However, other Christians believe in the concept of "invincible ignorance," which suggests that those who have not had the opportunity to hear the Gospel but seek truth and do what is right to the best of their understanding may also attain salvation.

Ultimately, the question of Cornelius' eternal destiny is a theological one and interpretations can vary widely.