The height you should attend before you turn 40 years.
There are lessons to be learnt and things to be done before you turn 40. A man is born with innate desire to take action immediately, but it is the effects of the past actions you took which turned out to be regretted that would keep you calm when next alarming situation arises that would have caused you to take an action, hence it is good to learn from situation and happenings in your life. What some people are fun of: Many people are fun of running away from things that involves some risk, although risk is not to be taken uncalculatively, but any one that always run away from taking some considered level of risk would turn out to be a follower to those that took the risk. Even if a man fails at the course of taking risk, he would gain wisdom from it, and know the best way to handle such things next time, while the one that ran away from the risk would be going to ask for wisdom from the one that gained knowledge...