The Torah, “Numbers” 22:22: God’s wrath flared because he was going, and an angel of the Lord stationed himself on the road to thwart him, and he was riding on his she-donkey, and his two servants were with him.
The law of gravity, for example, can be described as an angel that sits inside the earth and catches everything that is in the air and on the surface of the earth and pulls it to the ground.
A person feels angels as positive or negative forces because a person can measure and feel a certain phenomenon in his senses only compared to a phenomenon that is opposite to it such as light and darkness, cold and heat, bitterness and sweetness, strength and weakness, and so on. This is how every phenomenon appears in nature because everything must be balanced.
A person also exists opposite from the Creator at first. Although the Creator is concealed from us, we measure everything in relation to Him. This is our nature, and therefore, it is actually in this oppositeness that we feel we exist.
From KabTV’s “Secrets of the Eternal Book” 8/12/15