In Matthew 6:11 we don't know with certainty what the word translated "daily" means. This leads to much debate and two good interpretations: one literal and one metaphorical. Both understandings have merit. Both use good methodology. Both teach something that is taught elsewhere in Scripture, and in that sense, both of them are true. In this life, we may never be certain which one Jesus meant, but we can affirm the truths both of them teach.