What is an obstacle ?

The very first obstacles, from a human locomotion point of view, are temperature, availability of oxygen, and visibility of environment. Imagine you need to run outside, you first get dressed quickly. Then you need to move onward toward your destination, enduring the distance. Now, you need a good orientation to be able to reach your destination. You need to quickly change your direction to dodge things. You should be able to overcome hills. ONLY then, you should be able to vault, jump or climb. You should be able to confidently lift and carry something with you, perhaps later throw it. You could also find the need to swim across a river or dive to depth in order to retrieve something. As soon as you meet someone else, you overcome these obstacles together thanks to basic acrobatics. Later, unfortunate circumstances call you to defend yourself or provide first aid...TRAIN REAL - LIVE EASY...and in general, besides just physical ones, there are many obstacles in life waiting for you…