Spiritual self-esteem is gained from knowing that our work is a contribution and a blessing. Then we perform for the love of God with no thought of personal recognition... When our motivatlon for work is valid, the work will be spontaneous and creative.
What remain constant in every account of angels, from ancient days to the present, is that they are both messengers and companions to humans, sent from a realm beyond usual seeing. Angels appear, and in one way or another, help us, advise us, inspire us, or amaze us.