What is Wilderness Survival
Understanding the environment into which you will be entering in order to understand the potential risks and hazards inherent in that environment, and preparing yourself to reduce exposure to potential risk and injury in a survival situation.
Learning and developing the knowledge, the skill, and the will to keep yourself alive under any conditions, and often alone, until rescue is made either by the efforts of others or under your own power.
In other words -
It is always better to prepare for and to avoid potential problems, rather than to react once problems develop.