Life is like dip yourself into the water at the beach. Waves after waves come and push you as you move forward. The deeper you go the more difficult your feet moves. Every two steps you take, there will be a big wave push you back. Sometime, you face a strong wave that almost drown you to the bottom of the water. But you manage to stand up and continue move forward. Trial after trial, you learn the pattern and feel comfortable with the circumstance. You learn how to swim, to survive, and have fun as well.
That how our lives is. You face problems, fell down, then manage to stand up. if you are lucky, you also learn how to enjoy it as you go.