|Period||Begin||End||Achievement Number||Challenge Number|
|1st Period||since birth||to year||?||?|
|2nd Period||from year||to year||?||?|
|3rd Period||from year||to year||?||?|
|4th Period||from year||-||?||?|
Each life stage gives you an interim goal to aim at, and this goal is determined by your Achievement Number. Fulfillment of this goal by no means implies that you have to abandon your main purpose, as indicated by your Life Path number.
These interim goals do not sidetrack your pursuit of purpose, but rather help you avoid straying from the path leading you there. Most of the time, successful achievement of the interim goal is the essential prerequisite to your future well-being.
That's why the demands established by characteristics of your Achievement Number need to be taken seriously.
Properties of the Challenge Number give an indication on the type of problems that one will be regularly confronted with while reaching toward the interim goal. These problems should not be expected to come from without. Generally, they are the manifestations of our negative qualities brought out by the change in the type of activity.
For example, if the Challenge Number is 4, fulfillment of the interim goal will be hampered by one's own stubbornness, bullheadedness, conservatism, and inability to take the initiative. That is, you'll have to struggle with yourself in the first place.