4:10. You observe days and months and times, and years.
You observe days, etc… He speaks not of the observation of the Lord's day, or other Christian festivals; but either of the superstitious observation of days lucky and unlucky; or else of the Jewish festivals, to the observance of which, certain Jewish teachers sought to induce the Galatians.
4:11. I am afraid of you, lest perhaps I have laboured in vain among you.
4:12. Be ye as I, because I also am as you brethren, I beseech you. You have not injured me at all.
4:13. And you know how, through infirmity of the flesh, I preached the gospel to you heretofore: and your temptation in my flesh.
4:14. You despised not, nor rejected: but received me as an angel of God, even as Christ Jesus.
4:15. Where is then your blessedness? For I bear you witness that, if it could be done, you would have plucked out your own eyes and would have given them to me.
4:16. Am I then become your enemy, because I tell you the truth?
4:17. They are zealous in your regard not well: but they would exclude you, that you might be zealous for them.
4:18. But be zealous for that which is good in a good thing always: and not only when I am present with you.