Comp. Gal 1:18. Only in this chapter, and Joh 6:3. More commonly ἀναβαίνειν, often of the journey to Jerusalem, probably in the conventional sense in which Englishmen speak of going up to London, no matter from what point. See Mat 20:17; Mar 10:32; Joh 2:13; Act 11:2. In Act 18:22 the verb is used absolutely of going to Jerusalem. The reading ἀπῆλθον I went away had strong support, and is adopted by Weiss. In that case the meaning would be went away to Jerusalem from where I then was.
Apostles before me
In point of seniority. Comp. Rom 16:7.
Arabia
It is entirely impossible to decide what Paul means by this term, since the word was so loosely used and so variously applied. Many think the Sinaitic peninsula is meant (Stanley, Farrar, Matheson, Lightfoot). Others, the district of Auranitis near Damascus (Lipsius, Conybeare and Howson, Lewin, McGiffert). Others again the district of Arabia Petraea.