Statement 1: For the same load/force acting on two different surfaces, more pressure is developed on the surface with a smaller area.
Statement 2: Pressure is defined as thrust(force acting normally to the surface) per unit area.
Statement 1 is true, Statement 2 is true and Statement 2 is the correct explanation of Statement 1.
Pressure is defined as the thrust per unit area. So, for the same force or load, the pressure developed is more for a surface having a smaller area.
The sharp knife exerts a large pressure on the surface, due to the small area of contact.