Many things have been said about life. It is compared to a journey; the driver of the car needs to know when to shift gears because the gradient is not straight and constant. There are corners, bends, rough or smooth or dry or wet or muddy or tarmac roads.
Life is also likened to an adventure - it will throw you unexpected, unplanned and unanticipated situations. For example, when walking in a forest there are high chances of encountering a dangerous wild animal or getting lost in there. Or receiving a phone call that causes a mixture of emotions and changes your life forever either positively or negatively - death of a loved one or a rotary win.