Sakyamuni Buddha said:
“When you meet a teacher who presents complete Awakening, do not be concerned with family or nation, appearance, faults, or behaviours. Rather, if you value her wisdom, you should provide offerings every day of a million coins of gold. Offer food fit for the shining beings. Three times daily you should honour him, and never cause him to be troubled by you. If you do this then the Way of Awakening will be maintained. Since I first gave rise to the mind which seeks the Way  up until now, this is how I have practiced, and thus I have realized unexcelled Awakening.”
Zen Buddhist websites, news, and discussion
Monday, September 12, 2005
Another of Dogen zenji's texts, this one on finding a teacher and sincerity and faith.