The teacher who is indeed wise does not bid you to enter the house of his wisdom but rather leads you to the threshold of your own mind.
孔子说:“树立崇高理想、培养高尚品德、心怀仁慈友爱、陶冶高雅情操。”
I don't think about age. I think about people's spirit and energy and if they're positive and if they're fun to be around.