The word "apostle" literally means "sent one." Apostles in general were those sent out as traveling ministers (e.g. Luke 9:1-2). Below I will proceed to make a high level case in bullet form for why the role of Timothy in the early church was more apostolic than it was pastoral (not that there isn't overlap between the two). Some who have a strict criteria for who can be an apostle might get tripped up by me saying that Timothy was an apostle. I don't want that to be the main stumbling block. So, if it helps, consider my use of the term "apostle" in association with Timothy as "lower case a" apostle, not "upper case A" Apostle. Or, if that's still a stumbling block, then just use the term "apostolic worker" rather than "apostle" to describe Timothy. The main point is functional in that Timothy was primarily a traveling minister, not so much about an office Timothy filled. Timothy traveled wit...
As the people of God, we must hold to apostolic tradition (2 Thessalonians 2:15, 3:6) but reject human tradition (Colossians 2:8). Jesus criticized the religious leaders of His day for making void the word of God for the sake of their tradition (Matthew 15:6). And He said they did this in many ways (Mark 7:13b). We are not immune to this error today. This blog exists to test (1 Thessalonians 5:21) our modern Christian traditions against Scripture to discern where we might have done the same.