1). When you push on the wall with your hand, the wall pushes on your hand with an equal force.
2). You stand on the ground, and the ground pushes up on you with equal force.
3). When you bat the ball, the ball exerts an equal force on the bat.
4). When the horse pulls the wagon with 500 pounds of force, the wagon pulls the horse with 500 pounds of force. The source of that force is the horse, of course.
5). When the Earth's gravity pulls on you, the force is called "your weight on Earth". At the same time, your gravity pulls on the Earth, and that force should be called "the Earth's weight on you". The forces are equal ! If you weigh 75 pounds on Earth, then the Earth weighs 75 pounds on you.
And by the way, Sir Isaac spelled his name like "Newton".