There is no art to wandering. If I have a destination, a plan -- and objective -- I've lost the ability to find serendipity... I search for the Holy Grail of particularity and miss the chalice freely offered, filled full and overwhelming.
Angels are evidence that God is taking notice of us. They ask the same always: surrender, obedience, submission, and humility before the Holy One. Some say they make us homesick for heaven.