The wisest man is he who does not fancy that he is so at all ...
"The blind leading the blind" is a quote from Matthew 15:14
Jesus responds to a question about the Pharisees saying: "Every plant that my heavenly Father has not planted will be uprooted. Let them alone; they are blind guides (of the blind).
The use in Luke has a different context - Luke 6:39-40:
"Can a blind man lead a blind man? Will they not both fall into a pit? A student is not above his teacher, but everyone who is fully trained will be like his teacher."
Remember to count on yourself ... have faith in yourself ... give yourself credit before you give it to someone you "think" might know more than you ... and when in doubt, remember ...
"A wise man never knows all, only fools know everything"
"The wisest man is he who does not fancy that he is so at all"
"Wisdom is found only in truth"
"Let us not take ourselves too seriously. None of us has a monopoly on wisdom"
"The days that are still to come are the wisest witnesses"
"Some men are wise, and some are otherwise" ...