Allow me to begin with a story by the Japanese monk Yoshida K?nko, from his classic writings: 'The Essays of Idleness'. Once upon a time there lived a famous expert tree climber. One day, he was instructing a man on tree climbing - and directed him to the very top to cut off some branches. The master climber kept guiding the man, but when he got to the highest point of the tree and seemed to be in great danger, the expert just stood below and said nothing.
It is when the man climbed down and was at a seemingly safe point, that the master climber began to give him warnings, "Be careful! Watch your step coming down!" At that point, the companion with whom he was standing with at the bottom of the tree asked him - "Why did you warn him to be careful when he was at a safe height, and could even jump down if he chose?"