cycle of life

The sphinx riddle " What goes on four legs in the morning, two at noon, and three at evening?".
from my understanding, the first one on four legs is baby and that the early stage. This is because babies crawl on two legs and two hands and " in the morning" suggest early or the beginning. " two at noon" is when man stands straight up wit both his leg and noon suggest in between or in the middle. So this is the period between being young and old. the last " three in the evening" suggest that the aman i s old and he needs a walking stick to walk. In William Shakespeares ‘ As you like it’, man has seven stages. The first one is an infant, second as a school boy, third as a lover, fourth as a soldier, fifth as a justice, sixth as lean and slipper’d pantaloon and finally second as childishness and mere oblivion. In Shakespeare’s point of view, man has seven stages. This shows that Sophocles and Shakespear has different point of view because they from different era of time and has different view on life