Of old the expert in battle would first make himself invincible and then wait for his enemy to expose his vulnerability.
Sun TzuWhen a general, unable to estimate the enemy's strength, allows an inferior force to engage a larger one, or hurls a weak detachment against a powerful one, and neglects to place picked soldiers in the front rank, the result must be rout.
Sun TzuIf you fight with all your might, there is a chance of life; where as death is certain if you cling to your corner
Sun Tzu